UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549


                                    FORM 10-K


                  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                   For the fiscal year ended December 31, 2003


                           DUSA Pharmaceuticals, Inc.
             ------------------------------------------------------
             (Exact Name of Registrant as Specified in Its Charter)


               NEW JERSEY                                       22-3103129
    -------------------------------                         -----------------
    (State or Other Jurisdiction of                         (I.R.S. Employer)
     Incorporation or Organization)


             25 Upton Drive
         Wilmington, Massachusetts                                01887
----------------------------------------                        ----------
(Address of Principal Executive Offices)                        (Zip Code)


                         Commission File Number: 0-19777
                                                 -------


       Registrant's telephone number, including area code: (978) 657-7500
                                                           --------------


        Securities registered pursuant to Section 12(b) of the Act: None
                                                                    ----


           Securities registered pursuant to section 12(g) of the Act:


                           Common Stock, no par value
                           --------------------------
                                (Title of Class)

      Indicate by check mark  whether the  Registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
Registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days. Yes |X| No |_|

      Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 or Regulation S-K is not contained herein, and will not be contained, to the
best of Registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [ ]

      Indicate by check mark whether the Registrant is an accelerated  filer (as
defined in Exchange Act Rule 12b-2). Yes |_| No |X|

      The  aggregate  market value of the voting and  non-voting  common  equity
stock held by  non-affiliates  computed by  reference  to the price at which the
common  equity was last sold,  or the average bid and asked price of such common
equity, as of the last business day of the Registrant's most recently  completed
second fiscal quarter was $20,809,257.

      The number of shares of common stock  outstanding  of the Registrant as of
March 10, 2004 was 16,391,372.

                       DOCUMENTS INCORPORATED BY REFERENCE

      None.





                                     PART I

      This Annual  Report on Form 10-K and certain  written and oral  statements
incorporated herein by reference of DUSA  Pharmaceuticals,  Inc. (referred to as
"DUSA," "we," and "us") contain  forward-looking  statements that have been made
pursuant to the provisions of the Private  Securities  Litigation  Reform Act of
1995.  Such  forward-looking  statements  are  based  on  current  expectations,
estimates  and  projections  about  DUSA's  industry,  management's  beliefs and
certain  assumptions  made  by our  management.  Words  such  as  "anticipates,"
"expects,"  "intends," "plans," "believes," "seeks,"  "estimates," or variations
of  such  words  and  similar   expressions,   are  intended  to  identify  such
forward-looking  statements.  These  statements  are not  guarantees  of  future
performance and are subject to certain risks, uncertainties and assumptions that
are difficult to predict  particularly  in the highly  regulated  pharmaceutical
industry in which we operate.  Therefore,  actual results may differ  materially
from those expressed or forecasted in any such forward-looking  statements. Such
risks and  uncertainties  include those set forth herein under "Risk Factors" on
pages 28 through 41, as well as those noted in the documents incorporated herein
by  reference.  Unless  required by law, we  undertake no  obligation  to update
publicly any forward-looking statements, whether as a result of new information,
future  events or  otherwise.  However,  readers  should  carefully  review  the
statements  set forth in other  reports or  documents  we file from time to time
with the Securities and Exchange Commission,  particularly the Quarterly Reports
on Form 10-Q and any Current Reports on Form 8-K.

ITEM 1. BUSINESS

GENERAL

      DUSA is a  pharmaceutical  company  developing  drugs in combination  with
light devices to treat or detect a variety of  conditions in processes  known as
photodynamic  therapy  or  photodetection.  We  are  engaged  primarily  in  the
research,  development  and  marketing  of our first drug,  Levulan(R)  brand of
aminolevulinic acid HCl, or ALA, with light, for use in a broad range of medical
conditions. When we use Levulan(R) and follow it with exposure to light to treat
a  medical  condition,  it is  known  as  Levulan(R)  photodynamic  therapy,  or
Levulan(R)  PDT. When we use  Levulan(R) and follow it with exposure to light to
detect  medical  conditions  it  is  known  as  Levulan(R)  photodetection,   or
Levulan(R) PD.

      Our products,  the Levulan(R)  Kerastick(R)  20% Topical Solution with PDT
and the  BLU-U(R)  brand  light  source were  launched  in the United  States in
September  2000 for the treatment of actinic  keratoses,  or AKs, of the face or
scalp under a marketing,  development and supply agreement with Schering AG, our
former  marketing  collaborator.  AKs are  precancerous  skin lesions  caused by
chronic  sun  exposure  that can  develop  over time into a form of skin  cancer
called  squamous  cell  carcinoma.  In addition,  in September  2003 we received
clearance  from the FDA to market the BLU-U(R)  without  Levulan(R)  PDT for the
treatment of moderate inflammatory acne vulgaris.


                                       2



      In September  2002,  DUSA reacquired all marketing and product rights from
Schering AG when the parties terminated their marketing,  development and supply
agreement.  Consequently,  DUSA  commenced  marketing  its products  directly in
January 2003, and is wholly  responsible for all regulatory,  sales,  marketing,
customer service, and other related product activities.

      As a result of reacquiring our product  rights,  we evaluated our expenses
and  increased  the level of marketing and sales  activities,  while  minimizing
expenditures  that were not directly related to our core objectives for 2003. We
have incurred  significant  marketing and sales expenses in 2003,  including the
costs associated with the launching of our initial sales force and other related
marketing activities.  See section entitled  "Business-Marketing  and Sales". At
this time,  our  objectives  include  focusing  on  increasing  the sales of our
approved  products in the United States,  conducting  clinical  trials which, if
successful,  could lead to  additional  dermatology  indications,  and seeking a
partner  to  help  develop  and  market  Levulan(R)  PDT for  the  treatment  of
high-grade  dysplasia in patients  with  Barrett's  esophagus.  In addition,  we
continue to support  independent  investigator trials to advance research in the
use and applicability of Levulan(R) PDT for indications in dermatology,  as well
as for ablation of low-grade and high-grade dysplasia in patients with Barrett's
esophagus, among others. See section entitled "Business - Internal Indications".

      We are  developing  Levulan(R)  PDT and PD  under an  exclusive  worldwide
license  of  patents  and  technology   from  PARTEQ  Research  and  Development
Innovations, the licensing arm of Queen's University, Kingston, Ontario, Canada.
We also own or license  certain  other  patents  relating  to methods  for using
pharmaceutical  formulations  which  contain our drug and related  processes and
improvements.  In the United States,  DUSA(R),  DUSA  Pharmaceuticals,  Inc.(R),
Levulan(R),  Kerastick(R)  and BLU-U(R) are  registered  trademarks.  Several of
these trademarks are also registered in Europe, Australia,  Canada, and in other
parts of the world. See sections  entitled  "Business - Licenses;  and - Patents
and Trademarks".

      We were  incorporated on February 21, 1991, under the laws of the State of
New Jersey.  Our  principal  executive  offices  are located at 25 Upton  Drive,
Wilmington,  Massachusetts 01887 (telephone:  (978) 657-7500). On March 3, 1994,
we formed DUSA Pharmaceuticals New York, Inc., a wholly owned subsidiary located
in Valhalla,  New York, to coordinate our research and development  efforts.  We
have  financed our  operations  to date,  primarily  from sales of securities in
public  offerings,  private  and  offshore  transactions  that are  exempt  from
registration  under  the  Securities  Act of  1933,  as  amended,  (the  "Act"),
including  a  private  placement  under  Regulation  D  of  the  Act  which  was
consummated  on February 27,  2004,  and from  payments  received as part of the
agreement  with  our  former  marketing  collaborator.   See  sections  entitled
"Management's  Discussion  and  Analysis of  Financial  Condition - Overview;  -
Results of Operations; and - Liquidity and Capital Resources".


                                       3



BUSINESS STRATEGY

      The key elements of our strategy include the following:

      o     Support the Marketing  and Sales of our  Products.  In October 2003,
            DUSA  launched  its own small sales force  comprised of direct sales
            representatives and various independent sales organizations.  Due to
            the initial  success of these  activities,  DUSA plans to expand its
            sales capacity in 2004.

      o     Physician  Education  Support.  Commencing with the reacquisition of
            our product  rights,  we began to implement a new medical  education
            plan.  Efforts to support these activities include financial support
            of medical education,  participation in dermatology conferences, and
            improvement of third party reimbursement.

      o     Leveraging  our  Levulan(R)PDT/PD  Platform  to  Develop  Additional
            Products.  Based  on  market  research  completed  in  2003,  we are
            planning  Phase II  clinical  studies  related to the  treatment  of
            photodamaged  skin and  moderate to severe acne  vulgaris  that,  if
            successful,  could lead to significant market  opportunities for our
            products.  These  studies are  expected to commence in mid 2004.  In
            2003,   we   received   clearance   from  the  FDA  to  market   the
            BLU-U(R)without  Levulan(R),  to treat  moderate  inflammatory  acne
            vulgaris,  which supports a multi-use capability of our BLU-U(R), in
            addition  to  its  use  in  our  approved  AK  therapy.  Outside  of
            dermatology,  we are  developing  a  product  that  targets  a large
            market,  for the treatment of high-grade  dysplasia in patients with
            Barrett's esophagus.

      o     Enter into Additional Strategic Alliances.  If we determine that the
            development  program  for a given  indication  may be beyond our own
            resources or may be advanced to market more rapidly by collaborating
            with a  corporate  partner,  we may seek  opportunities  to license,
            market  or  co-promote  our  products.  We are  currently  seeking a
            strategic  partner  to  join  in  the  development,  marketing,  and
            distribution of our treatment for Barrett's esophagus dysplasia.  We
            may also consider  acquiring  additional  dermatology  products that
            complement our Levulan(R)PDT technology.

      o     Use  the  Results  of   Independent   Researchers  to  Identify  New
            Applications.   We  continue  to  support  research  by  independent
            investigators   so  that  we  have  the  benefit  of  the  resulting
            'anecdotal' human data for use in evaluating  potential  indications
            for corporate development. Such independent investigator studies may
            lead to additional Levulan(R)products for other skin conditions such
            as psoriasis,  onychomycosis,  warts,  molluscum  contagiosum,  oily
            skin,  and acne  rosacea.  We also  continue to monitor  independent
            research in order to identify other potential new indications.

PDT/PD OVERVIEW

      In general,  both  photodynamic  therapy and  photodetection  are two-step
processes:

      o     The  first   step  is  the   application   of  a  drug  known  as  a
            "photosensitizer," or a pre-cursor of this type of drug, which tends
            to collect in specific cells.


                                       4



      o     The second step is activation of the  photosensitizer  by controlled
            exposure to a selective light source.

      During this process,  energy from the light activates the photosensitizer.
In PDT, the activated photosensitizer transfers energy to oxygen molecules found
in cells,  converting the oxygen into a highly  energized form known as "singlet
oxygen,"  which destroys or alters the  sensitized  cells.  In PD, the activated
photosensitizer  emits energy in the form of light,  making the sensitized cells
fluoresce, or "glow".

      The longer the  wavelength  of visible  light,  the deeper  into tissue it
penetrates.  Different  wavelengths,  or colors of light, including red and blue
light,  may  be  used  to  activate  photosensitizers.   The  selection  of  the
appropriate  color of light for a given  indication  is  primarily  based on two
criteria:

      o     the  desired  depth of  penetration  of the  light  into the  target
            tissue, and

      o     the efficiency of the light in activating the photosensitizer.

      Blue light does not penetrate  deeply into  tissues,  and is better suited
for treating  superficial  lesions.  It is also generally a potent  activator of
photosensitizers.  Red light penetrates more deeply into tissues,  and is better
suited for treating cancers and deeper tissues.  However, it is generally not as
strong an  activator  of  photosensitizers.  Different  photosensitizers  do not
absorb  all  colors  of  visible  light  in  the  same  manner.  For  any  given
photosensitizer, some colors are more strongly absorbed than others.

      Another  consideration  in selecting a light source is the location of the
target  tissue.  Lesions on the skin which are easily  accessible can be treated
with either laser or non-laser light sources.  Internal  indications,  which are
often more difficult to access,  usually  require lasers in order to focus light
into small fiber optic delivery  systems that can be passed through an endoscope
or into hollow organs.

      PDT can be a highly selective treatment that targets specific tissue while
minimizing damage to normal  surrounding  tissue. It also can allow for multiple
courses of therapy.  The most common  side effect of  photosensitizers  that are
taken  systemically  is temporary  skin  sensitivity  to bright light.  Patients
undergoing  PDT and PD treatments are usually  advised to avoid direct  sunlight
and/or  to  wear  protective  clothing  during  this  period.  Patients'  indoor
activities are generally  unrestricted except that they are told to avoid bright
lights.  The degree of selectivity  and period of skin  photosensitivity  varies
among  different  photosensitizers  and is also  related to the drug dose given.
Photosensitizers without activation by light have no PDT/PD effects.


                                       5



OUR LEVULAN(R) PDT/PD PLATFORM

      OUR LEVULAN(R) BRAND OF ALA

      We have a unique  approach  to PDT and PD,  using  the  human  cell's  own
natural  processes.  Levulan(R) PDT takes  advantage of the fact that ALA is the
first product in a natural  biosynthetic pathway present in virtually all living
human cells. In normal cells, the production of ALA is tightly regulated through
a feedback inhibition process. In our PDT/PD system,  excess ALA (as Levulan(R))
is added from outside the cell, bypassing this normal feedback  inhibition.  The
ALA  is  then  converted  through  a  number  of  steps  into a  potent  natural
photosensitizer  named  protoporphyrin IX, or PpIX. This is the compound that is
activated by light during Levulan(R)  PDT/PD,  especially in fast growing cells.
Any PpIX that  remains  after  treatment  is  eliminated  naturally  by the same
biosynthetic pathway.

      We believe  that  Levulan(R)  is unique among  PDT/PD  agents.  It has the
following features:

      o     Naturally Occurring. ALA is a naturally occurring substance found in
            virtually all living human cells.

      o     Small  Molecule.  Levulan(R)is  a  small  molecule  that  is  easily
            absorbed whether delivered topically, orally, or intravenously.

      o     Highly Selective. Levulan(R) is not itself a photosensitizer, but is
            a pro-drug that is converted  through a cell-based  process into the
            photosensitizer PpIX. The combination of topical application, tissue
            specific  uptake,  conversion  into PpIX and targeted light delivery
            make this a highly selective process.  Therefore,  under appropriate
            conditions,  we can achieve  selective  clinical effects in targeted
            tissues with minimal  effects to normal  surrounding  and underlying
            tissues.

      o     Controlled Activation.  Levulan(R)has no PDT effect without exposure
            to  light  at  specific  wavelengths,   so  the  therapy  is  easily
            controlled.

      Scientists believe that the accumulation of PpIX following the application
of Levulan(R) is more pronounced in:

      o     rapidly growing diseased tissues, such as precancerous and cancerous
            lesions,

      o     conditions  characterized  by  rapidly  proliferating  cells such as
            those found in psoriasis and certain microbes, and

      o     in certain normally  fast-growing  tissues,  such as hair follicles,
            sebaceous glands, esophageal mucosa and the lining of the uterus.


                                       6



      OUR KERASTICK(R) BRAND APPLICATOR

      We  designed  our  proprietary  Kerastick(R)  specifically  for  use  with
Levulan(R).  It is a  single-use,  disposable  applicator,  which allows for the
rapid  preparation  and uniform  application of Levulan(R)  topical  solution in
standardized  doses.  The  Kerastick(R)  has two separate  glass  ampoules,  one
containing  Levulan(R) powder and one containing a liquid vehicle, both enclosed
within a single plastic tube and an outer  cardboard  sleeve.  There is a filter
and a metered dosing tip at one end. Prior to  application,  the doctor or nurse
crushes the ampoules and shakes the Kerastick(R)  according to directions to mix
the  contents  into a  solution.  The  Kerastick(R)  tip is then  dabbed  on the
individual  AK  lesions,  releasing a  predetermined  amount of  Levulan(R)  20%
topical solution.

      OUR LIGHT SOURCES

      Customized  light  sources are critical to  successful  Levulan(R)  PDT/PD
because the  effectiveness of Levulan(R)  therapy depends on delivering light at
an  appropriate  wavelength  and  intensity.  We intend to  continue  to develop
combination drug and light device systems, in which the light sources:

      o     are compact and tailored to fit specific medical needs,

      o     are pre-programmed and easy to use, and

      o     provide cost-effective therapy.

      Our proprietary  BLU-U(R) is a fluorescent light source that can treat the
entire face or scalp at one time.  The light  source is  reasonably  compact and
portable.  It can be used in a  physician's  office,  requires  only a  moderate
amount of floor space, and plugs into a standard electrical outlet. The BLU-U(R)
also incorporates a proprietary regulator that controls the optical power of the
light  source  to  within  specified  limits.  It  has a  simple  control  panel
consisting  of an on-off key switch and digital  timer which turns off the light
automatically  at the end of the treatment.  The BLU-U(R) is also compliant with
CE marking and ISO 9001 requirements.

      We are using non-laser light sources whenever feasible  because,  compared
to lasers, they are:

      o     safer,

      o     simpler to use,

      o     more reliable, and

      o     far less expensive.

                                       7



      For  treatment  of AKs,  our  BLU-U(R)  uses blue light  which  penetrates
superficial  skin  lesions  and  is a  potent  activator  of  PpIX.  Longer  red
wavelengths  penetrate more deeply into tissue but are not as potent  activators
of PpIX.  Therefore,  for treatment of superficial  lesions of the skin, such as
AKs, we are using relatively low intensity,  non-laser blue light sources, which
are  designed  to treat  large  areas,  such as the  entire  face or  body.  For
treatment of diseases that may extend several millimeters into the skin or other
tissues,  including  many  forms of  cancer;  high-powered  red light is usually
preferable.  In addition, DUSA received clearance from the FDA in September 2003
to  market  the  BLU-U(R)  without  Levulan(R)  for the  treatment  of  moderate
inflammatory acne vulgaris.


      In 2004,  DUSA will test its new  proprietary  endoscopic  light  delivery
system in a small Phase II  single-center  clinical  study of the  efficacy  and
safety of Levulan(R)  PDT for the treatment of high grade  dysplasia in patients
with  Barrett's  esophagus.  Our new system is  designed  to ease the process by
which  physicians  place fiber optics used for endoscopic  light delivery within
hollow  target  organs such as the  esophagus.  Currently,  for the treatment of
Barrett's esophagus  dysplasia,  insertion of a fiber optic is done by placement
of a balloon catheter system, which requires approximately three insertions into
the  patient's  esophagus,  with blind light  treatment  by the  physician  (the
endoscope  is removed  before light  treatment  and then  replaced  afterwards).
DUSA's  proprietary  endoscopic  light delivery allows fiber optic placement and
light treatment to the esophagus to be performed under direct visualization,  in
a single insertion.  Our device thus allows the endoscopic light treatment to be
performed more rapidly,  under direct  visualization,  and at greater comfort to
the patient.


                                       8



OUR PRODUCTS

      The following  table outlines our products and currently  planned  product
candidates.  Our research and development expenses for the last three years were
$5,403,961 in 2003, $12,121,606 in 2002, and $10,789,906 in 2001.




        INDICATION/PRODUCT                                                                 STATUS OF REGULATORY STUDIES
        ------------------                                                                 ----------------------------
                                                                                        
        DERMATOLOGY

        Levulan(R)Kerastick(R)and BLU-U(R)for PDT of Aks                                           Approved; Phase IV(1)

        Levulan(R)PDT for Photodamaged Skin                                                           Phase II       (2)

        Levulan(R)PDT for Moderate to Severe Acne Vulgaris                                            Phase II       (3)

        BLU-U(R)Treatment of Moderate Inflammatory Acne Vulgaris Without Levulan(R)               Market Clearance   (4)


        OTHER INDICATIONS

        Levulan(R)PDT for Barrett's Esophagus Dysplasia                                              Phase I/II

        Levulan(R)Induced Fluorescence Guided Resection for Brain Cancer                        European Phase III    (5)(6)

        DUSA(R)Endoscopic Light Delivery System                                                      Phase II         (7)


      1.    Phase IV final study report was filed with the FDA in January 2004.
      2.    Phase II IND was filed with the FDA in February 2004.
      3.    Phase II study planned to be proposed to the FDA by mid 2004.
      4.    In September 2003, the FDA provided market  clearance for the use of
            the BLU-U(R) for the light alone treatment of moderate  inflammatory
            acne vulgaris.
      5.    Licensed from Photonamic GmbH & Co. KG.
      6.    European Phase III trial results may not be acceptable to the FDA in
            the United States.
      7.    Phase II pilot clinical trial planned to commence by mid 2004.


DERMATOLOGY INDICATIONS

      In September  2002,  DUSA assumed all  responsibility  for its dermatology
research and  development  program as a result of the  termination of our former
marketing,  development  and  supply  agreement  with  Schering  AG.  Our former
dermatology  marketing partner had contributed nearly $3 million per year to the
program during 2000,  2001, and 2002. Since  reacquiring our product rights,  we
have focused on  formulating  our own  development  program.  We have decided to
develop Phase II clinical  programs for photodamaged skin and moderate to severe
acne vulgaris  which,  if  successful,  could lead to additional  dermatological
indications and significant market  opportunities.  These trials are expected to
be  initiated  in mid  2004.  DUSA also  continues  to  support a wide  range of
independent  investigator  studies using the Levulan(R)  Kerastick(R) that could
lead to additional new indications for future development.


                                       9



      Actinic  Keratoses  (AKs). AKs are superficial  precancerous  skin lesions
usually appearing as rough, scaly patches of skin with some underlying  redness.
The  traditional  methods of treating  AKs are  cryotherapy,  or the freezing of
skin, using liquid nitrogen;  and 5-fluorouracil  cream, or 5-FU.  Although both
methods can be effective,  each has  limitations  and can result in  significant
side effects.  Cryotherapy is  non-selective,  is usually painful at the site of
freezing and can cause blistering and loss of skin  pigmentation,  leaving white
spots. In addition, because there is no standardized treatment protocol, results
are  not  uniform.  5-FU  can be  highly  irritating  and  requires  twice-a-day
application  by  the  patient  for  approximately  2 to 4  weeks,  resulting  in
inflammation,  redness  and  erosion  or  rawness  of the  skin.  Following  the
treatment,  an  additional  1 to 2 weeks of healing is  required.  Our  approved
treatment  method involves  applying  Levulan(R) 20% topical  solution using the
Kerastick(R)  to the AK lesions,  followed 14 to 18 hours later with exposure to
our BLU-U(R) for  approximately 17 minutes.  In 2001, we successfully  completed
the first of two Phase IV trials  required by the Food and Drug  Administration,
or FDA,  testing for allergic skin  reactions to our therapy.  The second trial,
which  began in 2002 to  evaluate  the  long-term  effects of our  therapy,  was
completed in late 2003 and the final report was  submitted to the FDA in January
2004.

      During  2003,  we continued  to support  efforts to improve  reimbursement
levels to  physicians.  Such  efforts  included  working  with the  Centers  for
Medicare  and Medicaid  Services  (CMS) to reverse the bundling of the drug cost
with the procedure fee, which had occurred  effective March 1, 2003. In November
2003,  CMS agreed to  reinstate  the code for  physicians  to bill the drug cost
separate from the procedure fee. As a result,  effective  January 1, 2004, there
is  a  revised  national  reimbursement  code  for  Medicare  for  the  BLU-U(R)
application procedure and the cost of the Levulan(R)  Kerastick(R).  Doctors can
also bill for any applicable visit fees. However, some physicians have suggested
that even the new  reimbursement  levels still do not fully reflect the required
efforts to routinely execute our therapy in their practices. We believe that the
issues related to reimbursement  have affected the economic  competitiveness  of
our therapy  with other AK  therapies  and have  hindered  its  adoption in many
cases.

      In addition,  we continue to work to educate private insurance carriers so
that they will  approve our  therapy for  coverage.  As of  December  31,  2003,
several of the major private insurers have approved coverage for our AK therapy.
We believe that due to these efforts,  plus future improvements,  along with our
education  and marketing  programs,  a more  widespread  adoption of our therapy
should occur over time.


                                       10


      Facial Photodamaged Skin.  Photodamaged skin, which is skin damaged by the
sun,  occurs  primarily  in  fair-skinned  individuals  after  many years of sun
exposure.  Signs of  photodamaged  skin  include  roughness,  wrinkles and brown
spots.  AKs also  occur  frequently  in areas of  photodamaged  skin.  There are
numerous  consumer cosmetic and herbal products which claim to lessen or relieve
the symptoms of  photodamaged  skin. In most cases,  there is little  scientific
data to support these claims.  The FDA has approved only one prescription  drug,
Renova(R)(1),  to treat this common skin condition.  Patients  generally use the
product for between 6 and 24 weeks before improvement may be observed. There are
also a number of FDA approved laser and light-based treatments being used in the
treatment of photodamaged skin.

      As part of our AK  clinical  trials,  we  conducted  a Phase II safety and
efficacy study,  testing 64 patients with 3 to 7 AK lesions of the face or scalp
within  an  area of  photodamaged  skin.  The  physician  investigators  applied
Levulan(R) 20% topical  solution over the entire area including the photodamaged
skin.  After 14 to 18 hours,  the  patients  were  treated  with  blue  light at
differing light doses.  Investigators noted marked improvement in skin roughness
in the  treated  areas  in  two-thirds  of the  patients  after  treatment  with
Levulan(R)  PDT as well as some  degree of  improvement  of  wrinkles  and brown
spots. However, 10 of the 64 patients found that the burning and stinging of the
PDT  therapy  was too  uncomfortable  and as a result the  treatment  was either
terminated early or the light power was reduced.  No patients reported a serious
treatment-related  adverse  event.  During  2003,   DUSA-supported   independent
investigator   studies  for  photodamaged   skin  were  completed   including  a
short-incubation  study using  different light sources:  a BLU-U(R),  pulsed dye
lasers,   and  intense  pulsed  light  sources.   Certain  of  the   independent
investigator  studies  focused on providing  evidence  which may be used to help
optimize  the  method of  treatment  for  future  studies.  According  to recent
peer-reviewed  publications,  these studies have shown that,  when Levulan(R) is
applied to the entire face for as little as one hour followed by treatment  with
the BLU-U(R),  or pulsed light  sources,  efficacy in removing AKs is similar to
that of our  Phase  III  trials,  which  used  spot  application  on each AK and
overnight  incubation.  Additionally,  these studies  report that patients' skin
have shown improvements in various photodamaged skin parameters,  including skin
quality,   sallowness,   roughness,  fine  wrinkling,  and  Griffiths  score,  a
photonumeric scale for the assessment of skin photodamage. Accordingly, based on
the results of our previous Phase II safety and efficacy  study,  the results of
independent  investigator  studies, and other anecdotal reports, we are planning
to initiate a DUSA-sponsored Phase II study in mid 2004.

      Acne.  Acne is a common  skin  condition  caused  by the  blockage  and/or
inflammation  of sebaceous  (oil)  glands.  Traditional  treatments  for mild to
moderate facial inflammatory acne include  over-the-counter  topical medications
for mild cases,  and  prescription  topical  medications or oral antibiotics for
mild  to  moderate  cases.  For  cystic  acne,  an  oral  retinoid  drug  called
Accutane(R)(2) is the most commonly  prescribed  treatment.  It is also commonly
used for moderate to severe inflammatory acne.  Over-the-counter  treatments are
not effective for many patients and can result in side effects including drying,
flaking and redness of the skin. Prescription antibiotics lead to improvement in
many cases,  but patients  must often take them on a long-term  basis,  with the
associated  risks of increased  antibiotic  resistance.  Accutane(R)  can have a
variety of side  effects,  from  dryness of the lips and joint  pains,  to birth
defects,  and  elevated  levels of  triglycerides  and/or  liver  enzymes.  With
Levulan(R)  PDT therapy for moderate to severe acne vulgaris we would be seeking
to improve or clear  patients'  acne without the need for long-term oral therapy
and with fewer side effects than current therapies.

--------------

(1)   Renova(R)is a registered trademark of Johnson & Johnson.

(2)   Accutane(R)is a registered trademark of Hoffmann-La Roche.

                                       11



      As  part  of  the  co-development  program  with  our  former  partner,  a
dose-ranging  clinical  trial was completed in 2001.  The specific low drug dose
protocol tested was not able to replicate the positive  clinical results seen in
previous  independent  research  using  higher  drug  doses but  which  also was
associated  with  significant  side  effects.   However,  based  on  results  of
independent  investigator  studies that were  completed  during 2003, we believe
that this is a potential  significant  indication for Levulan(R) PDT. A protocol
for this indication is under development as we plan to initiate a DUSA-sponsored
Phase  II  study  during   2004.   The  study  will  utilize  the  BLU-U(R)  and
short-incubation,  broad-area application of the Levulan(R)  Kerastick(R).  This
combination has been reported in published  independent  investigator studies as
being effective, while having minimal treatment-related side effects.

      In addition,  DUSA received  clearance  from the FDA in September  2003 to
market  the  BLU-U(R)  without  Levulan(R)  PDT for the  treatment  of  moderate
inflammatory acne vulgaris.

OTHER POTENTIAL DERMATOLOGY INDICATIONS

      There  are  numerous  other  potential  uses  for  Levulan(R)   PDT/PD  in
dermatology,  and we are  currently  supporting,  or may in the  future  support
research in several of these areas, with corporate-sponsored Phase I-III trials,
pilot trials,  and/or  investigator-sponsored  studies,  based on  pre-clinical,
clinical,  regulatory  and marketing  criteria we have  established  through our
strategic  planning  processes.  Some  of  the  additional  potential  uses  for
Levulan(R)  in  dermatology   include  treatment  of  skin  conditions  such  as
psoriasis, onychomycosis, warts, molluscum contagiosum, oily skin, acne rosacea,
and cancers, such as squamous cell carcinomas and cutaneous T-cell lymphomas.

INTERNAL INDICATIONS

      Barrett's  Esophagus   Dysplasia.   Barrett's  esophagus  is  an  acquired
condition  in which the normal  tissue  lining of the  esophagus  is replaced by
abnormal tissue in response to chronic  exposure to stomach acid. Over time, the
area of the esophagus affected can develop dysplastic  (precancerous)  cells. As
the dysplasia  progresses  from low-grade to high-grade,  the risk of esophageal
cancer increases  significantly,  such that, patients with confirmed  high-grade
dysplasia  often  undergo  major  surgery to remove the affected  portion of the
esophagus.  The condition is often  undetected  until the disease  reaches later
stages.


                                       12



      Medical   treatment  of  the  condition  has  commonly  included  lifelong
anti-reflux  therapy with drugs called proton pump  inhibitors to reduce stomach
acid,  while  treatment for more  advanced,  precancerous,  Barrett's  esophagus
dysplasia  involves surgery to remove affected areas of the esophagus.  The role
of anti-reflux  surgery,  and/or medical  devices is also being evaluated by the
medical  community.  In August 2003, a competitor  received approval for its PDT
therapy for Barrett's esophagus. See section entitled "Business - Competition ".

      Independent  European  studies have reported that in late-stage  Barrett's
esophagus the high-grade dysplasia can be destroyed by ALA PDT. In a randomized,
controlled  European  investigator  study supported by DUSA,  Levulan(R) PDT has
been shown to allow the  conversion  of  early-stage  Barrett's  esophagus  with
low-grade  dysplasia and portions of Barrett's  esophageal lining back to normal
esophageal lining.

      During the second half of 2001,  we started two Phase I/II studies for the
treatment  of early and  late-stage  Barrett's  esophagus,  respectively,  using
systemic Levulan(R) followed by red laser light in varying light doses. Patients
were  randomized to receive various light doses,  with  retreatment if required,
and follow-up for 24 months after the initial  treatment.  In our clinical trial
in which the primary efficacy goal was the ablation of high-grade dysplasia,  or
HGD, in Barrett's esophagus (late stage Barrett's esophagus),  six patients with
HGD were treated with  Levulan(R)  PDT. Of the six  patients  treated,  five had
complete  clearing of their  areas of  high-grade  dysplasia,  and four of those
patients  have  now  been  followed  for a  period  greater  than 1 year,  which
indicates a durable response for complete HGD ablation. One patient dropped from
follow-up at the 2-month visit. No esophageal scarring or ruptures were noted in
the course of this study. HGD ablation  continues in the patients  followed.  In
our  low-grade  dysplasia  (early  stage)  clinical  trial in which the  primary
efficacy goal was the conversion of Barrett's esophagus to normal esophagus,  10
of the 11  patients  that were  treated  with  Levulan(R)  PDT are  still  being
followed.   Complete  Barrett's   esophagus  mucosal  ablation  after  a  single
Levulan(R)  PDT  treatment  remained  stable in 3/10  (30%)  patients.  Two-year
follow-up data for most patients is being collected. There was 1 patient in this
study  that had mild  esophageal  scarring  without  symptoms.  The most  common
adverse  events in both studies were mild to moderate  nausea and  vomiting.  In
order to control ongoing  research and  development  costs during 2003, we chose
not to enroll any  additional  patients to these  studies,  but will continue to
follow the patients that have already been treated.

      In preparation  for a Phase II clinical trial, we are planning to initiate
a small  single-center  pilot Phase II clinical  trial in 2004 using  DUSA's new
proprietary endoscopic light delivery device for the treatment of HGD.

      Brain Cancer.  Despite  standard  therapies  that include  surgical  tumor
removal,  radiation  therapy,  and  chemotherapy,  adult  patients with the most
aggressive  high-grade  malignant  brain  tumor type,  glioblastoma  multiforme,
generally survive only 1 year.  Independent European investigators have reported
that  systemic  ALA dosing  before  surgical  resection  of tumors  resulted  in
selective  fluorescence of only the tumors. The normal white matter of the brain
showed no fluorescence.  These investigators used ALA-induced  fluorescence in a
study involving 52 patients with glioblastoma multiforme as a guide for the more
complete removal of tumors than would be possible using white light alone.  This
technique is called fluorescence-guided resection.


                                       13


      In December 2002, we entered into a License and Development Agreement with
Photonamic  GmbH & Co. KG, a subsidiary  of medac GmbH, a German  pharmaceutical
company.  This  agreement  provides  for  the  licensing  to us of  Photonamic's
proprietary  technology related to ALA for systemic dosing in the field of brain
cancer.  The technology  provides DUSA with access to a systemic  formulation of
ALA, and a significant  amount of pre-clinical data, both of which could also be
useful and are also  licensed to DUSA for certain other  indications,  including
Barrett's  esophagus  dysplasia.  Photonamic is currently  conducting a European
Phase III  clinical  trial in which  ALA-induced  fluorescence  is used to guide
surgical tumor  resection in patients  suffering from  glioblastoma  multiforme.
European  Phase III trial results may not be acceptable by the FDA in the United
States and we do not  intend,  at this time,  to repeat this study in the United
States.  These clinical  trials are expected to continue  through late 2004 at a
minimum,  so safety and efficacy for the brain cancer  indication is still to be
determined. See section entitled "Business - Licenses".

OTHER POTENTIAL INTERNAL INDICATIONS

      There may be numerous other  potential  therapeutic  and cancer  detection
uses for  Levulan(R)  PDT/PD,  and we are  currently  supporting,  or may in the
future  support,  research  in  several of these  areas,  as  appropriate,  with
corporate-sponsored  clinical  trials,  and/or  investigator-sponsored  studies,
based on  pre-clinical,  clinical,  regulatory  and  marketing  criteria we have
established  through our  strategic  planning  processes.  Some of the potential
non-dermatology    indications    include    detection   and/or   treatment   of
gastro-intestinal  tumors,  bladder  cancer,  pre-cancer  and cancer of the oral
cavity, and pre-cancer and cancer of the larynx.

SUPPLY PARTNERS

      National  Biological  Corporation.  In November  1998,  we entered  into a
purchase and supply agreement with National  Biological  Corporation ("NBC") for
the  manufacture of some of our light sources,  including the BLU-U(R).  We have
agreed to order from NBC all of our supply needs of these light  sources for the
United States and Canada, and NBC has agreed to supply us with the quantities we
order. If an opportunity  arises, the parties have agreed to negotiate the terms
under which NBC would supply us with light  sources for sale in countries  other
than the current territories.


                                       14



      NBC has  granted to us a license to  manufacture  the light  sources if it
fails to meet our supply needs. Under these circumstances,  we would also have a
worldwide  license to import,  use,  sell or dispose of the light  sources under
NBC's  technology  within the field of PDT. In addition,  NBC has agreed that it
will not supply light sources that may be used to compete with our business. The
agreement  has a 10-year  term,  subject  to earlier  termination  for breach or
insolvency or for convenience.  However, a termination for convenience  requires
12 months' prior written notice.

      Sochinaz  SA.  Under an agreement  dated  December  24, 1993,  Sochinaz SA
("Sochinaz")  manufactures and supplies substantially all of our requirements of
Levulan(R)  worldwide  from its FDA approved  facility in  Switzerland.  In June
2000,  we amended the  agreement  to include an option to allow us to extend the
term for an  additional  3 years  until  December  3, 2007.  While we can obtain
alternative supply sources in certain circumstances, any new supplier would have
to be inspected and qualified by the FDA.

      medac GmbH.  In December  2002,  we entered into a supply  agreement  with
medac GmbH in connection with the Photonamic license agreement  mentioned above.
We have a license to market and sell the  formulation  exclusively in the United
States and in several  other  countries and  non-exclusively  in the rest of the
world subject to certain field limitations.  The supply agreement covers medac's
current  systemic  dosage  formulation  for  use  in  brain  cancer,   Barrett's
esophagus, as well as for other mutually agreed upon indications.  The agreement
provides for minimum purchase requirements  following our first commercial sale.
In  addition,  the  agreement  has a term of 10 years from the date of our first
commercial sale,  subject to earlier  termination  rights, as well as successive
one-year renewal terms.

LICENSES

      PARTEQ  Research  and  Development  Innovations.  We license  the  patents
underlying our Levulan(R)  PDT/PD systems under a license  agreement with PARTEQ
Research and Development  Innovations  ("PARTEQ"),  the licensing arm of Queen's
University,  Kingston,  Ontario.  Under the  agreement,  which became  effective
August 27, 1991,  we have been granted an exclusive  worldwide  license,  with a
right to sublicense,  under PARTEQ's patent rights,  to make, have made, use and
sell products  which are  precursors of PpIX,  including ALA. The agreement also
covers any improvements  discovered,  developed or acquired by or for PARTEQ, or
Queen's  University,  to  which  PARTEQ  has the  right to  grant a  license.  A
non-exclusive  right is reserved to Queen's University to use the subject matter
of the agreement for non-commercial  educational and research purposes.  A right
is reserved to the  Department  of National  Defense  Canada to use the licensed
rights for defense purposes including defense procurement but excluding sales to
third-parties.


                                       15


      When we are selling our products directly, we have agreed to pay to PARTEQ
royalties of 6% and 4% on 66% of the net selling price in countries where patent
rights do and do not exist, respectively.  In cases where we have a sublicensee,
we will pay 6% and 4% when patent rights do and do not exist,  respectively,  on
our  net  selling  price  less  the  cost  of  goods  for  products  sold to the
sublicensee,  and 6% of royalty  payments we receive on sales of products by the
sublicensee.  We are also  obligated to pay 5% of any lump sum  sublicense  fees
paid to us, such as milestone  payments,  excluding  amounts  designated  by the
sublicensee  for future  research  and  development  efforts.  The  agreement is
effective for the life of the latest United States patents and becomes perpetual
and royalty-free when no United States patent subsists. Annual minimum royalties
to PARTEQ must total at least CDN  $100,000  (U.S.  $77,000 as of  December  31,
2003) in order to retain the license.  We have the right to terminate the PARTEQ
agreement  with or without  cause upon 90 days  notice.  See "Note  15(a) to the
Company's Notes to the Consolidated Financial Statements ".

      Together  with  PARTEQ and Draxis  Health,  Inc.,  our former  parent,  we
entered into an agreement (the "ALA Assignment  Agreement") effective October 7,
1991.  According to the terms of this agreement we assigned to Draxis our rights
and obligations  under the PARTEQ license agreement to the extent they relate to
Canada.  On February 24, 2004, we  reacquired  these rights and agreed to pay an
upfront fee and a royalty on sales of the Levulan(R) Kerastick(R) in Canada over
a five-year term following the first  commercial sale in Canada.  We will now be
responsible  for any royalties  which would be due to PARTEQ for Canadian sales.
Draxis also agreed to assign to us the  Canadian  regulatory  approvals  for the
Levulan(R)  Kerastick(R)  with PDT for AKs.  We also  hold  Canadian  regulatory
approval for the BLU-U(R).  We expect to launch our Levulan(R)  Kerastick(R) and
BLU-U(R) in Canada in 2004.

      Photonamic  GmbH & Co. KG. In December 2002, we entered into a license and
development  agreement  with  Photonamic  GmbH  &  Co.  KG,  a  recently  formed
subsidiary  of medac  GmbH,  a German  pharmaceutical  company.  This  agreement
provides for the licensing to us of Photonamic's  proprietary technology related
to aminolevulinic acid (ALA), the compound we use in our Levulan(R) Photodynamic
Therapy (PDT) and Photodetection (PD).

      Under the terms of the  agreement,  we  received a license  for the United
States and several other countries,  to use Photonamic's  technology,  including
pre-clinical and clinical data,  related to ALA for systemic dosing in the field
of brain  cancer,  and for  indications  which the parties  may jointly  develop
during the term of their collaboration. Additionally, we are entitled to use the
pre-clinical data for indications which we may develop on our own. Photonamic is
currently  conducting a European Phase III clinical  trial in which  ALA-induced
fluorescence  is used to guide  surgical tumor  resection in patients  suffering
from the most  aggressive  form of adult brain tumor,  glioblastoma  multiforme.
This clinical trial is expected to continue through late 2004, at a minimum.  We
paid a $500,000  up-front  license  fee,  and will be  obligated  to pay certain
regulatory  milestones  of  $1,250,000  upon FDA  acceptance  of a  registration
application  for a brain  cancer  product in the United  States,  an  additional
$1,250,000 upon registration of the product, and royalties of 12.5% on net sales
under the terms of the License and  Development  Agreement  and royalties on net
sales of any brain cancer  product  which  utilizes the  Photonamic  technology.
Should  Photonamic's  clinical  study be  successful,  we will be  obligated  to
proceed with  development of the product in the United States in order to retain
the license for the use of the technology in the treatment of brain cancer.  The
agreement  has a term of 10 years from the date of first  approval  of a product
using Photonamic's technology, subject to earlier termination rights, as well as
one-year renewal terms.


                                       16



PATENTS AND TRADEMARKS

      We  actively  seek,  when   appropriate,   to  protect  our  products  and
proprietary  information  through United States and foreign patents,  trademarks
and  contractual  arrangements.  In  addition,  we rely  on  trade  secrets  and
contractual   arrangements   to  protect  certain  aspects  of  our  proprietary
information and products.

      Our ability to compete  successfully  depends,  in part, on our ability to
defend our patents that have issued,  obtain new patents,  protect trade secrets
and operate  without  infringing the  proprietary  rights of others.  We have no
product patent  protection for the compound ALA itself, as our basic patents are
for methods of detecting  and treating  various  diseased  tissues  using ALA or
related  compounds called  precursors,  in combination with light. Even where we
have patent  protection,  there is no guarantee  that we will be able to enforce
our patents.  Patent  litigation is expensive,  and we may not be able to afford
the costs. We own or exclusively license patents and patent applications related
to the following:

      o     methods of using ALA and its unique  physical  forms in  combination
            with light,

      o     compositions and apparatus for those methods, and

      o     unique physical forms of ALA.

      These  patents  expire no  earlier  than 2009,  and  certain  patents  are
entitled to terms beyond that date.  Effective  September  29, 2003,  the United
States  Patent  and  Trademark  Office  extended  the  term  of U.S  Patent  No.
5,079,262,  with respect to our approved AK  indication  for  Levulan(R),  until
September 29, 2013.

      Under the license  agreement with PARTEQ,  we hold an exclusive  worldwide
license to certain  patent rights in the United  States and a limited  number of
foreign countries. See section entitled "Business - Licenses." All United States
patents and patent applications  licensed from PARTEQ relating to ALA are method
of treatment patents.  Method of treatment patents limit direct  infringement to
users of the methods of  treatment  covered by the patents.  We  currently  have
patents and/or pending patent  applications in the United States and in a number
of  foreign  countries  covering  unique  physical  forms  of ALA,  compositions
containing ALA, as well as ALA applicators,  light sources for use with ALA, and
other technology.  We cannot guarantee that any pending patent applications will
mature into issued patents.


                                       17



      We have limited patent  protection  outside the United  States,  which may
make it easier for third-parties to compete there. Our basic method of treatment
patents and applications have counterparts in only four foreign  countries,  one
of which is the subject of legal action.  See sections  entitled "Risk Factors -
Risks Related to DUSA"; and "Legal Proceedings".

      We can provide no assurance  that a third-party or parties will not claim,
with  or  without  merit,  that  we  have  infringed  or  misappropriated  their
proprietary  rights.  A number of entities have obtained,  and are attempting to
obtain patent protection for various uses of ALA. We can provide no assurance as
to whether any issued patents, or patents that may later issue to third-parties,
may affect  the uses on which we are  working or  whether  such  patents  can be
avoided,  invalidated or licensed if they cannot be avoided or  invalidated.  If
any  third-party  were to assert a claim for  infringement,  we can  provide  no
assurance that we would be successful in the litigation or that such  litigation
would not have a material  adverse effect on our business,  financial  condition
and results of operation.  Furthermore, we may not be able to afford the expense
of defending against such a claim.

      In  addition,  we cannot  guarantee  that our  patents,  whether  owned or
licensed,  or any future  patents that may issue,  will prevent other  companies
from developing similar or functionally equivalent products.  Further, we cannot
guarantee  that we will continue to develop our own patentable  technologies  or
that  our  products  or  methods   will  not   infringe   upon  the  patents  of
third-parties. In addition, we cannot guarantee that any of the patents that may
be issued to us will effectively protect our technology or provide a competitive
advantage  for  our  products  or  will  not  be  challenged,   invalidated,  or
circumvented in the future.

      We also attempt to protect our  proprietary  information as trade secrets.
Generally   agreements  with   employees,   licensing   partners,   consultants,
universities, pharmaceutical companies and agents contain provisions designed to
protect the  confidentiality  of our proprietary  information.  However,  we can
provide no assurance that these agreements will provide effective protection for
our proprietary  information in the event of  unauthorized  use or disclosure of
such information.  Furthermore, we can provide no assurance that our competitors
will not independently develop substantially  equivalent proprietary information
or  otherwise  gain  access  to our  proprietary  information,  or  that  we can
meaningfully protect our rights in unpatentable proprietary information.

      Even in the absence of composition of matter patent protection for ALA, we
may receive  financial  benefits from:  (i) patents  relating to the use of such
products (like PARTEQ's patents);  (ii) patents relating to special compositions
and  formulations;  (iii) limited  marketing  exclusivity  that may be available
under the Hatch-Waxman Act and any counterpart  protection  available in foreign
countries and (iv) patent term extension under the Hatch-Waxman Act. See section
entitled  "Business - Government  Regulation".  Effective patent protection also
depends on many other  factors such as the nature of the market and the position
of the product in it, the growth of the market,  the  complexities and economics
of the process for  manufacture of the active  ingredient of the product and the
requirements  of the new drug  provisions of the Food, Drug and Cosmetic Act, or
similar laws and regulations in other countries.


                                       18



      We seek  registration  of  trademarks  in the  United  States,  and  other
countries  where we may market our  products.  To date,  we have been  issued 22
trademark registrations, and other applications are pending.

MANUFACTURING

      Historically,  our drug, Levulan(R), the Kerastick(R) brand applicator and
the BLU-U(R)  brand light source were each  manufactured  by single  third-party
suppliers.  In December  2002,  we terminated  our  agreement  with North Safety
Products, Inc., a unit of Norcross Safety Products, LLC, for the manufacture and
supply of our  Kerastick(R),  in light of our  decision to build a  Kerastick(R)
manufacturing line at our Wilmington  facility.  We believe that the development
of our own  manufacturing  capabilities  will  enable  us to better  manage  and
control  the  costs  of  production;   however,  until  product  sales  increase
significantly our unit cost per Kerastick(R) at our new facility will be higher.
On July 14,  2003,  we received  FDA  approval  to  manufacture  the  Levulan(R)
Kerastick(R) at our facility, and in February 2004 we commenced manufacturing in
support of our plan to maintain a  reasonable  level of  Kerastick(R)  inventory
based on sales  projections.  This  facility  will also be  utilized  to produce
clinical supplies for our own studies in addition to investigator  studies which
we plan to support.

DISTRIBUTION

      Effective  December 10, 2003, DUSA signed an amended  agreement with Moore
Medical Corporation  ("Moore"),  a national  distributor and marketer of medical
and surgical  supplies,  to remove Moore's  exclusivity rights and allow DUSA to
use other  third-party  distributors  to sell its products.  Since then, we have
appointed two additional  distributors.  Third-party distributors have also been
authorized to sell the BLU-U(R) on the Company's  behalf.  All distributors have
the  right  for a period  of time  following  termination  of  their  respective
agreement, to return their inventory of product.

MARKETING AND SALES

      Under  the  agreement  with  our  former  dermatology  marketing  partner,
marketing and sales of Levulan(R)  PDT products were the  responsibility  of the
partner.  As a result of the termination of that relationship in September 2002,
we commenced implementing our own marketing and sales strategy.


                                       19



      In August 2003,  we hired an  Associate  Vice  President of Sales,  and in
October 2003 we hired,  trained, and deployed a sales force, which was initially
comprised of six direct  representatives,  various independent  representatives,
and an  independent  sales  distributor,  designed  to  focus on most of our key
geographic  markets in the United  States.  At the end of December 2003 we hired
our seventh direct representative in a key target market, and in January 2004 we
continued to expand our sales capacity by adding one more direct  representative
and an  independent  representative  in another  key target  market.  Due to the
success of our  initial  sales  launch,  we plan to continue to expand our sales
capacity during 2004.

      The Health Protection  Branch - Canada has granted marketing  approval for
the Levulan(R)  Kerastick(R)  with PDT using the BLU-U(R) for AKs of the face or
scalp.  Pursuant to an agreement dated February 24, 2004 Draxis agreed to assign
to us the rights to market the product in Canada. See section entitled "Business
- Licenses". We expect to launch our products in Canada in 2004.

COMPETITION

      Commercial  development  of PDT agents other than  Levulan(R) is currently
being pursued by a number of companies.  These  include:  QLT  PhotoTherapeutics
Inc. (Canada); Axcan Pharma Inc. (U.S.);  Miravant, Inc. (U.S.);  Pharmacyclics,
Inc.  (U.S.);  medac GmbH and Photonamic GmbH & Co. KG (Germany);  and PhotoCure
ASA (Norway)  who entered  into a marketing  agreement  with  Galderma  S.A. for
countries  outside of Nordic  countries  for  certain  dermatology  indications.
Several of these companies are also  commercializing  and/or conducting research
with ALA or ALA-related compounds.

      PhotoCure  has  received  marketing  approval  of its ALA  precursor  (ALA
methyl-ester) compound for PDT treatment of AK and basal cell carcinoma,  called
BCC,  in  the  European  Union,  New  Zealand,   Australia,   and  countries  in
Scandinavia.  PhotoCure  has also filed for  regulatory  approval  in the United
States for these  indications.  PhotoCure has received a notice of approvability
from  the FDA for its AK  therapy  and has  stated  that it  expects  the FDA to
approve  its  product  in the first  half of 2004.  If  PhotoCure  receives  FDA
approval to market its product in the United  States,  and if it enters into the
marketplace, its product will directly compete with our products. In April 2002,
we received a copy of a notice issued by PhotoCure ASA to Queen's  University at
Kingston,  Ontario,  alleging  that one of the patents  covered by our agreement
with PARTEQ,  Australian  Patent No. 624985,  relating to ALA, is invalid.  As a
consequence  of this action,  Queen's  University  has  assigned the  Australian
patent to us so that we may participate directly in this litigation. We filed an
answer  setting  forth our  defenses  and a related  countersuit  alleging  that
certain  activities  of PhotoCure  and its  marketing  partner,  Galderma  S.A.,
infringe  the  patent.  The case is ongoing  and we are  unable to  predict  the
outcome at this time.  DUSA believes that the final hearing in the Federal Court
of Australia will occur in April 2004. See section entitled "Legal Proceedings".


                                       20



      In August 2003, Axcan Pharma Inc. received FDA approval for the use of its
product,  PHOTOFRIN(R)(3),  for  photodynamic  therapy in the  treatment of high
grade dysplasia associated with Barrett's esophagus. This approval enabled Axcan
to be the first  company to market a PDT therapy for this  indication,  which we
are also pursuing.

      There  are also  non-PDT  products  for the  treatment  of AKs,  including
cryotherapy  with liquid  nitrogen,  5-fluorouracil,  and  imiquimod,  which was
approved  on or about  March 3,  2004.  The  pharmaceutical  industry  is highly
competitive,  and many of our competitors have substantially  greater financial,
technical and marketing  resources  than we have. In addition,  several of these
companies  have  significantly  greater  experience  than  we do  in  developing
products,  conducting  preclinical and clinical testing and obtaining regulatory
approvals to market  products for health care.  Our  competitors  may succeed in
developing  products that are safer or more effective than ours and in obtaining
regulatory   marketing   approval   of  future   products   before  we  do.  Our
competitiveness  may also be affected by our ability to  manufacture  and market
our  products  and by the  level of  reimbursement  for the cost of our drug and
treatment by third-party payors, such as insurance companies, health maintenance
organizations and government agencies.

      We believe that comparisons of the properties of various  photosensitizing
PDT drugs will also highlight  important  competitive issues. We expect that our
principal  methods of  competition  with other PDT companies  will be based upon
such factors as the ease of  administration  of our  photodynamic  therapy;  the
degree of generalized  skin  sensitivity to light; the number of required doses;
the selectivity of our drug for the target lesion or tissue of interest; and the
type and cost of our light  systems.  New drugs or future  developments  in PDT,
laser  products or in other drug  technologies  may provide  therapeutic or cost
advantages for competitive products. No assurance can be given that developments
by other parties will not render our products uncompetitive or obsolete.

      In September 2003 we received FDA clearance to market the BLU-U(R) without
Levulan(R) for the treatment of moderate  inflammatory  acne vulgaris.  Numerous
laser or non-laser light sources provide direct competition to our BLU-U(R).

      Our  current  primary  competitors  for  our  products  are  the  existing
therapies  for treatment of AKs and moderate  inflammatory  acne  vulgaris.  See
section entitled "Business - Dermatology Indications,  Actinic Keratoses; Acne."
Our principal  method of competition  with these therapies is patient  benefits,
including rapid healing and excellent cosmetic results.

-----------------

(3)   PHOTOFRIN(R)is a registered trademark of Axcan Pharma Inc.


                                       21


GOVERNMENT REGULATION

      The  manufacture  and sale of  pharmaceuticals  and medical devices in the
United States are governed by a variety of statutes and regulations.  These laws
require, among other things:

      o     approval of manufacturing facilities, including adherence to current
            good   manufacturing,   laboratory  and  clinical  practices  during
            production and storage known as cGMP, GLP and GCP, respectively,

      o     controlled research and testing of products,

      o     applications  for  marketing  approval   containing   manufacturing,
            preclinical  and clinical  data to establish the safety and efficacy
            of the product, and

      o     control of marketing activities, including advertising and labeling.

      The marketing of pharmaceutical  products requires the approval of the FDA
in the United  States,  and  similar  agencies in other  countries.  The FDA has
established  regulations  and safety  standards,  which apply to the preclinical
evaluation,  clinical  testing,  manufacture  and  marketing  of  pharmaceutical
products.  The process of obtaining  marketing  approval for a new drug normally
takes several years and often  involves  significant  costs.  The steps required
before a new drug can be  produced  and  marketed  for human  use in the  United
States include:

      o     preclinical studies

      o     the filing of an Investigational New Drug, or IND, application,

      o     human clinical trials, and

      o     the approval of a New Drug Application, or NDA.

      Preclinical  studies are  conducted  in the  laboratory  and on animals to
obtain  preliminary  information  on a  drug's  efficacy  and  safety.  The time
required for conducting  preclinical  studies  varies  greatly  depending on the
nature of the drug, and the nature and outcome of the studies.  Such studies can
take many years to complete.  The results of these  studies are submitted to the
FDA as part of the IND application.  Human testing can begin if the FDA does not
object to the IND application.

      The human clinical  testing program  involves three phases.  Each clinical
study  typically is  conducted  under the  auspices of an  Institutional  Review
Board, or IRB, at the institution where the study will be conducted. An IRB will
consider among other things,  ethical factors, the safety of human subjects, and
the possible liability of the institution.  A clinical plan, or "protocol," must
be  submitted  to the FDA prior to  commencement  of each  clinical  trial.  All
patients  involved in the clinical trial must provide  informed consent prior to
their participation. The FDA may order the temporary or permanent discontinuance
of a clinical trial at any time for a variety of reasons, particularly if safety
concerns exist. These clinical studies must be conducted in conformance with the
FDA's bioresearch monitoring regulations.


                                       22



      In Phase I,  studies are usually  conducted  on a small  number of healthy
human volunteers to determine the maximum tolerated dose and any product-related
side effects of a product.  Phase I studies  generally require several months to
complete,  but can take  longer,  depending  on the drug and the  nature  of the
study.  Phase II studies are  conducted on a small  number of patients  having a
specific  disease  to  determine  the most  effective  doses  and  schedules  of
administration.  Phase II studies  generally  require from  several  months to 2
years to complete, but can take longer,  depending on the drug and the nature of
the study.  Phase III  involves  wide scale  studies on  patients  with the same
disease in order to provide  comparisons  with  currently  available  therapies.
Phase III studies  generally  require from 6 months to 4 years to complete,  but
can take longer, depending on the drug and the nature of the study.

      Data from  Phase I, II and III trials  are  submitted  to the FDA with the
NDA. The NDA involves  considerable data collection,  verification and analysis,
as well  as the  preparation  of  summaries  of the  manufacturing  and  testing
processes and  preclinical  and clinical  trials.  Submission of an NDA does not
assure FDA approval for marketing.  The  application  review  process  generally
takes 1 to 4 years to complete,  although reviews of treatments for AIDS, cancer
and other life-threatening diseases may be accelerated,  expedited or subject to
fast track treatment.  The process may take substantially longer if, among other
things,  the FDA has questions or concerns about the safety and/or efficacy of a
product.  In  general,  the  FDA  requires  properly  conducted,   adequate  and
well-controlled   clinical  studies   demonstrating  safety  and  efficacy  with
sufficient levels of statistical assurance.  However, additional information may
be required. For example, the FDA also may request long-term toxicity studies or
other studies  relating to product safety or efficacy.  Even with the submission
of such data,  the FDA may decide  that the  application  does not  satisfy  its
regulatory  criteria for approval and may disapprove the NDA.  Finally,  the FDA
may require  additional  clinical tests following NDA approval to confirm safety
and efficacy, often referred to as Phase IV clinical trials.

      Upon approval,  a prescription  drug may only be marketed for the approved
indications  in the approved  dosage  forms and at the approved  dosage with the
approved labeling.  Adverse experiences with the product must be reported to the
FDA. In addition,  the FDA may impose  restrictions  on the use of the drug that
may be difficult and expensive to administer. Product approvals may be withdrawn
if compliance  with  regulatory  requirements  is not  maintained or if problems
occur or are discovered after the product reaches the market. After a product is
approved for a given  indication,  subsequent new indications,  dosage forms, or
dosage  levels for the same product are reviewed by the FDA after the filing and
upon approval of a supplemental  NDA. The supplement deals primarily with safety
and effectiveness data related to the new indication or dosage. Finally, the FDA
requires reporting of certain safety and other information, often referred to as
"adverse  events" that become known to a manufacturer of an approved drug. If an
active  ingredient  of  a  drug  product  has  been  previously  approved,  drug
applications can be filed that may be less time-consuming and costly.


                                       23



      On December 3, 1999,  the FDA  approved the  marketing  of our  Levulan(R)
Kerastick(R)  20% Topical  Solution with PDT for treatment of AKs of the face or
scalp.  The  commercial  version  of  our  BLU-U(R),   used  together  with  the
Kerastick(R)  to provide PDT for the  treatment  of  non-hyperkeratotic  actinic
keratoses,  or AKs, of the face or scalp, was approved on September 26, 2000. We
also received  clearance  from the FDA in September  2003 to market the BLU-U(R)
without Levulan(R) PDT for the treatment of moderate inflammatory acne vulgaris.

      We are following  patients who completed our Phase I/II studies to examine
the use of  Levulan(R)  for the treatment of Barrett's  esophagus  with areas of
high-grade  dysplasia.  Other  than  the  FDA-approved  use  of  the  Levulan(R)
Kerastick(R)  with PDT for treatment of AKs, our other potential  products still
require  significant   development,   including  additional  preclinical  and/or
clinical testing, and regulatory marketing approval prior to  commercialization.
The process of obtaining required approvals can be costly and time consuming and
there can be no guarantee that the use of Levulan(R) in any future products will
be successfully developed, prove to be safe and effective in clinical trials, or
receive applicable regulatory marketing approvals.

      Medical devices,  such as our light source device, are also subject to the
FDA's  rules  and  regulations.  These  products  are  required  to  be  tested,
developed,  manufactured  and  distributed in accordance  with FDA  regulations,
including good manufacturing, laboratory and clinical practices. Under the Food,
Drug & Cosmetic  Act, all medical  devices are  classified as Class I, II or III
devices.  The  classification  of a device  affects the degree and extent of the
FDA's  regulatory  requirements,  with  Class III  devices  subject  to the most
stringent requirements and FDA review. Generally, Class I devices are subject to
general  controls (for example,  labeling and adherence to the cGMP  requirement
for medical  devices),  and Class II devices are subject to general controls and
special controls (for example,  performance standards,  postmarket surveillance,
patient registries and FDA guidelines).  Class III devices,  which typically are
life-sustaining or life-supporting and implantable  devices, or new devices that
have been found not to be substantially equivalent to a legally marketed Class I
or Class II "predicate device," are subject to general controls and also require
clinical  testing to assure  safety and  effectiveness  before FDA  approval  is
obtained.  The FDA also has the authority to require clinical testing of Class I
and II devices.  The BLU-U(R) is part of a combination product as defined by FDA
and therefore has been  classified as a Class III device.  We are  developing an
endoscopic device for the Barrett's  esophagus  indication which we believe will
also be  classified  as Class III and be  subject  to the  highest  level of FDA
regulation.  Approval  of Class III  devices  require  the filing of a premarket
approval, or PMA, application supported by extensive data, including preclinical
and clinical  trial data, to  demonstrate  the safety and  effectiveness  of the
device.  If human  clinical  trials  of a device  are  required  and the  device
presents a  "significant  risk,"  the  manufacturer  of the device  must file an
investigational  device exemption or "IDE"  application and receive FDA approval
prior to commencing  human clinical  trials.  At present,  our devices are being
studied in preclinical and clinical trials under our INDs.


                                       24



      Following  receipt of the PMA application,  if the FDA determines that the
application is sufficiently  complete to permit a substantive review, the agency
will accept it for filing and further review.  Once the submission is filed, the
FDA begins a review of the PMA  application.  Under the Food, Drug and Cosmetics
Act,  the FDA has 180  days to  review  a PMA  application.  The  review  of PMA
applications more often occur over a significantly  protracted time period,  and
the FDA may take up to 2 years or more from the date of filing to  complete  its
review.  In  addition,  a PMA for a device  which  forms  part of a  combination
product will not be approved unless and until the NDA for the corresponding drug
is also approved.

      The PMA process can be expensive, uncertain and lengthy. A number of other
companies  have  sought  premarket  approval  for  devices  that have never been
approved for marketing.  The review time is often significantly  extended by the
FDA, which may require more information or clarification of information  already
provided in the  submission.  During the review  period,  an advisory  committee
likely will be convened to review and evaluate the PMA  application  and provide
recommendations  to the FDA as to whether  the  device  should be  approved  for
marketing.  In  addition,  the FDA will  inspect the  manufacturing  facility to
ensure  compliance with cGMP  requirements for medical devices prior to approval
of  the  PMA  application.  If  granted,  the  premarket  approval  may  include
significant  limitations  on the  indicated  uses for which the  product  may be
marketed, and the agency may require post-marketing studies of the device.

      Medical  products  containing a combination of drugs,  including  biologic
drugs,  or devices may be  regulated  as  "combination  products"  in the United
States.  A combination  product  generally is defined as a product  comprised of
components from 2 or more regulatory categories  (drug/device,  device/biologic,
drug/biologic,  etc.).  In  December  2002,  the FDA  established  the Office of
Combination Products, or OCP, whose responsibilities, according to the FDA, will
cover the  entire  regulatory  life  cycle of  combination  products,  including
jurisdiction decisions as well as the timeliness and effectiveness of pre-market
review, and the consistency and appropriateness of post-market regulation.

      In connection  with our NDA for the Levulan(R)  Kerastick(R)  with PDT for
AKs, a combination  filing (including a PMA for the BLU-U(R) light source device
and the NDA for the  Levulan(R)  Kerastick(R))  was  submitted to the Center for
Drug Evaluation and Research. The PMA was then separated from the NDA submission
by the FDA and reviewed by the FDA's Center for Devices and Radiological Health.
Based upon this  experience,  we anticipate  that any future NDAs for Levulan(R)
PDT/PD will be a combination  filing  accompanied by PMAs. There is no guarantee
that PDT products will continue to be regulated as combination products.


                                       25



      The United States Drug Price  Competition and Patent Term  Restoration Act
of 1984 known as the  Hatch-Waxman  Act establishes a 5 year period of marketing
exclusivity  from the date of NDA approval for new  chemical  entities  approved
after  September  24,  1984.  Levulan(R)  is a new  chemical  entity  and market
exclusivity  under  this law will  expire  on  December  3,  2004.  During  this
Hatch-Waxman   marketing  exclusivity  period,  no  third-party  may  submit  an
"abbreviated NDA" or "paper NDA" to the FDA.

      Finally,  any  abbreviated  or paper NDA applicant  will be subject to the
notification  provisions of the  Hatch-Waxman  Act, which should  facilitate our
notification about potential  infringement of our patent rights. The abbreviated
or paper NDA  applicant  must  notify the NDA holder and the owner of any patent
applicable  to the  abbreviated  or paper NDA product,  of the  application  and
intent to market the drug that is the subject of the NDA.

      We also  intend  to market  our  products  outside  of the  United  States
beginning with Canada later this year. Generally, we try to design our protocols
for clinical  studies so that the results can be used in all the countries where
we hope to market the product.  However,  countries sometimes require additional
studies to be conducted on patients located in their country. Prior to marketing
a product in other countries,  approval by that nation's regulatory  authorities
must be obtained. Our former marketing partner had been responsible for applying
for  marketing  approvals  outside  the  United  States for  Levulan(R)  PDT for
dermatology uses and did file  applications for approval in Austria,  Australia,
South  Africa  and  Brazil.  However,  as we  have  determined  that  we  should
concentrate  solely on the United States market at this time, we authorized  our
former partner to withdraw the application for regulatory approval of Levulan(R)
PDT in Australia,  and have now followed the same course for the applications in
Austria  and South  Africa.  In 2003,  we also  advised  our  former  partner to
withdraw the applications for the Levulan(R) Kerastick(R) and BLU-U(R) in Brazil
as it was determined that such rights cannot be transferred to us. We are in the
process of  determining  the  requirements  to  reapply in Brazil,  and have not
determined  if we will reapply in any of the other  countries  at this time.  We
also are investigating whether we can resubmit our application in Australia with
additional  clinical results we have obtained since withdrawing that application
in order to satisfy the Australian regulatory requirements for approval.

      With the enactment of the Drug Export  Amendments Act of the United States
in 1986,  products  not yet  approved  in the United  States may be  exported to
certain foreign  markets if the product is approved by the importing  nation and
approved for export by the United States government. We can provide no assurance
that we will be able to get approval for any of our potential  products from any
importing  nations'  regulatory  authorities  or be able to  participate  in the
foreign pharmaceutical market.


                                       26



      Our research and  development  activities have involved the controlled use
of certain  hazardous  materials,  such as mercury in fluorescent  tubes. We are
subject to various laws and regulations governing the use, manufacture, storage,
handling and disposal of hazardous materials and certain waste products.  During
the design, construction and validation phases of our new Kerastick(R) facility,
we have taken steps to ensure that appropriate environmental controls associated
with the facility comply with environmental  laws and standards.  We can provide
no assurance that we will not have to make significant  additional  expenditures
in order to comply with environmental laws and regulations in the future.  Also,
we cannot assure that current or future  environmental  laws or regulations will
not materially adversely effect our operations, business or assets. In addition,
although we believe that our safety  procedures for the handling and disposal of
such  materials  comply with the standards  prescribed by current  environmental
laws and regulations,  the risk of accidental contamination or injury from these
materials cannot be completely eliminated.  In the event of such an accident, we
could be held liable for any damages that result,  and any such liability  could
exceed our resources.

PRODUCT LIABILITY AND INSURANCE

      We are subject to the inherent  business risk of product  liability claims
in the  event  that the use of our  technology  or any  prospective  product  is
alleged  to have  resulted  in  adverse  effects  during  testing  or  following
marketing  approval of any such product for commercial sale. We maintain product
liability  insurance for coverage of our clinical  trial  activities and for our
commercial supplies. There can be no assurance that such insurance will continue
to be  available  on  commercially  reasonable  terms  or that  it will  provide
adequate  coverage  against all potential  claims.  See section  entitled "Legal
Proceedings".

EMPLOYEES

      At  the  end  of  2003,  we had 50  full-time  employees  and 1  part-time
employee.   Our  2002   staffing   levels  for  key   management   personnel  in
administrative,   financial,   technical  and  operations   functions  had  been
established to support the initial  expected sales levels of Levulan(R) PDT that
did not  materialize.  Therefore,  following  the  reacquisition  of our product
rights in September 2002, we downsized our staffing levels by approximately 20%.
Since that time, we have been gradually  adding  employees as needed,  including
our direct sales force.

      We have employment  agreements with all of our key executive officers.  We
have  purchased,  and are the  named  beneficiary  of, a key man life  insurance
policy having a face value of CDN  $2,000,000 on the life of our  President.  We
also retain numerous independent consultants and the services of key researchers
at leading university centers whose activities are coordinated by our employees.
We intend to hire other employees and consultants as needed.


                                       27



INTERNET INFORMATION

      Our internet site is located at www.dusapharma.com.  Copies of our reports
filed pursuant to Section 13(a) or 15(d) of the Exchange Act,  including  Annual
Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form
8-K may be accessed  from our  website,  free of charge,  as soon as  reasonably
practicable  after we  electronically  file such reports  with,  or furnish such
reports to, the Securities and Exchange Commission.


                                  RISK FACTORS

You  should  carefully  consider  and  evaluate  all of the  information  in, or
incorporated by reference in, this prospectus. The following are among the risks
we face related to our business,  assets and  operations.  They are not the only
ones we face.  Any of these  risks could  materially  and  adversely  affect our
business,  results of operations  and financial  condition,  which in turn could
materially  and adversely  affect the value of the  securities  being offered by
this prospectus.

This section of the prospectus contains forward-looking statements of our plans,
objectives,  expectations  and  intentions.  We use words such as  "anticipate,"
"believe,"  "expect,"  future" and "intend" and similar  expressions to identify
forward-looking  statements.  Our actual  results could differ  materially  from
those  anticipated  in  these  forward-looking   statements  for  many  reasons,
including the risks factors  described  below and elsewhere in this  prospectus.
You should not place undue reliance on these forward-looking  statements,  which
apply only as of the date of this prospectus.

                              RISKS RELATED TO DUSA

WE ARE NOT CURRENTLY  PROFITABLE  AND MAY NOT BE PROFITABLE IN THE FUTURE UNLESS
WE CAN  SUCCESSFULLY  MARKET  AND SELL OUR  APPROVED  PRODUCTS,  THE  LEVULAN(R)
KERASTICK(R)  WITH THE BLU-U(R)  BRAND LIGHT SOURCE FOR THE  TREATMENT OF AKS OF
THE FACE OR SCALP,  AND THE BLU-U(R)  WITHOUT  LEVULAN(R)  FOR THE  TREATMENT OF
MODERATE INFLAMMATORY ACNE.

      WE HAVE ONLY  LIMITED  EXPERIENCE  MARKETING  AND  SELLING  PHARMACEUTICAL
      PRODUCTS AND, AS A RESULT, OUR REVENUES FROM PRODUCT SALES MAY SUFFER.

      If we are unable to  successfully  market and sell our approved  products,
revenues  from product  sales will be lower than  anticipated  and our financial
condition  may be adversely  affected.  As of  September  1, 2002,  DUSA and our
former  marketing  partner for  dermatology  products  terminated  the  parties'
marketing,  development and supply  agreement.  As a result of this termination,
DUSA is solely  responsible for marketing its approved  dermatology  products in
the United  States and the rest of the  world.  We will be doing so without  the
experience of having  marketed  pharmaceutical  products in the past. In October
2003,  DUSA began  hiring a small  direct  sales  force and has  engaged a small
number of independent sales  representatives  to market our products.  Acquiring
and  retaining  marketing  and sales  force  capabilities  involves  significant
expense,  and current sales levels are not  offsetting  the expenses  related to
these  efforts.  We may need to hire  additional  sales people to penetrate  the
market.  If our sales and marketing efforts fail, then sales of the Kerastick(R)
and the BLU-U(R) will be adversely affected.


                                       28



      IF WE CANNOT IMPROVE PHYSICIAN  REIMBURSEMENT AND/OR CONVINCE MORE PRIVATE
      INSURANCE  CARRIERS TO ADEQUATELY  REIMBURSE  PHYSICIANS  FOR OUR THERAPY,
      SALES OF OUR LEVULAN(R) KERASTICK(R) FOR AKS PRODUCT MAY SUFFER.

      Without  adequate  levels  of  reimbursement  by  government  health  care
programs and private health insurers, the market for our Levulan(R) Kerastick(R)
for AKs therapy will be limited. While we continue to support efforts to improve
reimbursement  levels TO  physicians  and are  working  with the  major  private
insurance  carriers to improve coverage for our therapy,  if our efforts are not
successful,  adoption  of our  therapy  and  sales  of  our  products  could  be
negatively  impacted.  As of January 1, 2004, a new national  reimbursement code
for Medicare  and other  third-party  payors for the  BLU-U(R)  PDT  application
procedure and for the costs of thE  Levulan(R)  Kerastick(R)  became  effective.
Doctors can also bill for any applicable  visit fees.  However,  some physicians
have suggesTED that even the new reimbursement levels still do not fully reflect
the required efforts to routinely execute our PDT therapy in their practices.

      SINCE WE NOW OPERATE THE ONLY FDA APPROVED  MANUFACTURING FACILITY FOR THE
      KERASTICK(R)  AND  CONTINUE  TO RELY  HEAVILY  ON SOLE  SUPPLIERS  FOR THE
      MANUFACTURE  OF LEVULAN(R) AND THE BLU-U(R),  ANY SUPPLY OR  MANUFACTURING
      PROBLEMS COULD NEGATIVELY IMPACT OUR SALES.

      If  we  experience  problems  producing  Kerastick(R)  units  in  our  new
facility, or either of our contract suppliers fail tO supply DUSA's requirements
of Levulan(R) or the BLU-U(R), our business,  financial condition and results of
operations  would  suffer.  WE are not  currently  approved to  manufacture  the
BLU-U(R) on our own and have not ordered any new BLU-U(R)  units since 2001.  In
additiON, while we have received FDA approval to manufacture the Kerastick(R) in
our own manufacturing  facility,  we have not yet produceD commercial quantities
of Kerastick(R) units in the facility on a regular basis.

      Manufacturers and their subcontractors  often encounter  difficulties when
commercial  quantities  of products  are  manufactured  for the first  time,  or
re-starting production after a long lay-off, or large quantities of new products
are manufactured, including problems involving:

      o     product yields,

      o     quality control,

      o     component and service availability,

      o     compliance with FDA regulations, and

      o     the need for further FDA  approval if  manufacturers  make  material
            changes to manufacturing processes and/or facilities.


                                       29



      We cannot  guarantee that problems will not arise with production  yields,
costs or quality as we and our suppliers seek to commence, re-start and increase
production.  Any manufacturing  problems could delay or limit our supplies which
would hinder our marketing and sales efforts.

      If our  facility,  any  facility  of our  contract  manufacturers,  or any
equipment in those  facilities,  is damaged or destroyed,  we may not be able to
quickly or  inexpensively  replace  it.  Likewise,  if there are any  quality or
supply  problems with any  components or materials  needed to  manufacturer  our
products, we may not be able to quickly remedy the problem(s).

      ANY FAILURE TO COMPLY WITH ONGOING GOVERNMENTAL  REGULATIONS IN THE UNITED
      STATES AND ELSEWHERE WILL LIMIT OUR ABILITY TO MARKET OUR PRODUCTS.

      Both  the  manufacture  and  marketing  of our  products,  the  Levulan(R)
Kerastick(R)  with the BLU-U(R) for AKs and the BLU-U(R)  WITHOUT  Levulan(R) to
treat moderate inflammatory acne are subject to continuing FDA review as well as
comprehensive   regulation  by  the  FDA  anD  by  state  and  local  regulatory
authorities. These laws require, among other things,

      o     approval of manufacturing  facilities,  including  adherence to good
            manufacturing   and  laboratory   practices  during  production  and
            storage,

      o     controlled research and testing of products even after approval, and

      o     control of marketing activities, including advertising and labeling.

      If we, or any of our  contract  manufacturers,  fail to comply  with these
requirements, DUSA may be limited in the jurisdictions in which we are permitted
to sell our products.  Additionally,  if we or our manufacturers  fail to comply
with applicable regulatory approval requirements, a regulatory agency may also:

      o     send us warning letters,

      o     impose fines and other civil penalties on us,

      o     seize our products,

      o     suspend our regulatory approvals,

      o     refuse to approve  pending  applications  or supplements to approved
            applications filed by us,

      o     refuse to permit exports of our products from the United States,

      o     require us to recall products,

      o     require us to notify  physicians of labeling  changes and/or product
            related problems,

      o     impose restrictions on our operations, and/or

      o     criminally prosecute us.


                                       30



      We and our  manufacturers  must  continue to comply with the FDA's current
Good  Manufacturing  Practice,  commonly known as cGMP,  and equivalent  foreign
regulatory  requirements.  The cGMP  requirements  govern  quality  control  and
documentation  policies  and  procedures.  In  complying  with cGMP and  foreign
regulatory requirements,  we and our third-party manufacturers will be obligated
to expend  time,  money and effort in  production,  record  keeping  and quality
control to assure that our products  meet  applicable  specifications  and other
requirements.

      As part of our FDA approval  for the  Levulan(R)  Kerastick(R)  for AK, we
were required to conduct two Phase IV follow-UP  studies.  We have  successfully
completed the first study; and submitted our final report on the second study to
the FDA in January 2004.  While we believe this second study was also a success,
the FDA may request  additional  information  and/or studies.  Additionally,  if
previously unknown problems with the product, a manufacturer or its facility are
discovered in the future, changes in product labeling restrictions or withdrawal
of the product from the market may occur.

      Manufacturing facilities are subject to ongoing periodic inspection by the
FDA, including unannounced inspections. We cannot guarantee that our third-party
supply sources, or our own new Kerastick(R) facility,  will continue to meet all
applicable FDA  regulations in the future.  If we, or any of our  manufacturers,
fail to maintain compliance with FDA regulatory  requirements,  it would be time
consuming and costly to remedy the problem(s) or to qualify other sources. These
consequences  could  have an  adverse  effect  on our  financial  condition  and
operations.

      IF  PRODUCT  SALES  DO NOT  INCREASE  SIGNIFICANTLY  WE MAY NOT BE ABLE TO
      ADVANCE DEVELOPMENT OF OUR OTHER POTENTIAL PRODUCTS AS QUICKLY AS WE WOULD
      LIKE TO,  WHICH WOULD DELAY THE  APPROVAL  PROCESS  AND  MARKETING  OF NEW
      POTENTIAL PRODUCTS.

      If we do not generate sufficient  revenues from our approved products,  we
may be forced to delay or  abandon  some or all of  DUSA's  product  development
programs. The pharmaceutical  development and commercialization  process is time
consuming  and costly,  and any delays  might result in higher costs which could
adversely affect our financial condition. Without sufficient product sales, DUSA
might  be  required  to seek  additional  funding.  There is no  guarantee  that
adequate  funding  sources could be found to continue the development of all our
potential  products.  DUSA might be  required  to commit  substantially  greater
capital than we have to research and development of such products and we may not
have sufficient funds to complete all or any of our development programs.


                                       31



      WE  HAVE  SIGNIFICANT  LOSSES  AND  ANTICIPATE  CONTINUED  LOSSES  FOR THE
      FORESEEABLE FUTURE.

      We have a history of operating  losses. We expect to have continued losses
through at least 2004 as we attempt to increase  sales of our approved  products
in the  marketplace  and continue  research  and  development  of potential  new
products.  As of December 31, 2003,  our  accumulated  deficit was  $58,909,781.
Although sales of the Kerastick(R) have increased with the addition of our saleS
force and our ongoing medical  education  activities,  we cannot predict whether
any of our  products  will achieve  significant  market  acceptance  or generate
sufficient revenues to enable us to become profitable.

IF WE ARE  UNABLE TO  PROTECT  OUR  PROPRIETARY  TECHNOLOGY,  TRADE  SECRETS  OR
KNOW-HOW, WE MAY NOT BE ABLE TO OPERATE OUR BUSINESS PROFITABLY.

      WE HAVE  LIMITED  PATENT  PROTECTION  AND IF WE ARE UNABLE TO PROTECT  OUR
      PROPRIETARY RIGHTS,  COMPETITORS MIGHT BE ABLE TO DEVELOP SIMILAR PRODUCTS
      TO COMPETE WITH OUR PRODUCTS AND TECHNOLOGY.

      Our ability to compete  successfully  depends,  in part, on our ability to
defend patents that have issued,  obtain new patents,  protect trade secrets and
operate without  infringing the proprietary rights of others. We have no product
patent  protection  for our  Levulan(R)  brand of the  compound  ALA.  Our basic
patents are for methods of detecting and treating various diseased tissues using
ALA (or related compounds called precursors),  in combination with light. We own
or exclusively license patents and patent applications related to the following:

      o     methods of using ALA and its unique  physical  forms in  combination
            with light, and

      o     compositions and apparatus for those methods, and

      o     unique physical forms of ALA,

      We have limited patent  protection  outside the United  States,  which may
make it easier for third-parties to compete there. Our basic method of treatment
patents and applications have counter-parts in only four foreign countries. Even
where we have patent  protection,  there is no guarantee that we will be able to
enforce our  patents.  Additionally,  enforcement  of a given  patent may not be
practicable or an economically viable alternative.

      Our patent protection in Australia may be diminished or lost entirely.  In
2002,  we received  notice of a lawsuit  filed in  Australia  by  PhotoCure  ASA
alleging that Australian Patent No. 624985, which is one of the patents licensed
by PARTEQ  Research & Development  Innovations,  the technology  transfer arm of
Queen's University at Kingston,  Ontario, to us, relating to our ALA technology,
is invalid.  As a consequence of this action,  Queen's  University  assigned the
Australian patent to DUSA so that we can participate directly in the litigation.
We have filed a response to the allegations of invalidity in court and have also
filed a counter suit alleging that PhotoCure's  activities in Australia infringe
our  patent.  We cannot  predict  the  outcome of  PhotoCure's  action  alleging
invalidity.  Australia is a significant  pharmaceutical market for AK therapies,
and loss of this patent could negatively  impact us in at least two ways. First,
if we are able to  enter  the  Australia  market,  the  lack of a  patent  would
probably retard or diminish our market share. Second, third-parties might not be
interested in licensing the product in Australia without patent protection which
would limit potential revenues from this market.


                                       32



      Some of the indications  for which we are developing  therapies may not be
covered by the claims in any of our existing patents.  Even with the issuance of
additional patents to DUSA, other parties are free to develop other uses of ALA,
including medical uses, and to market ALA for such uses, assuming that they have
obtained appropriate  regulatory  marketing approvals.  ALA in the chemical form
has been commercially  supplied for decades, and is not itself subject to patent
protection.  There are reports of third-parties conducting clinical studies with
ALA in  countries  outside the United  States  where PARTEQ does not have patent
protection.  In addition, a number of third-parties are seeking patents for uses
of ALA not covered by our patents.  These other uses,  whether  patented or not,
and the  commercial  availability  of ALA,  could  limit the scope of our future
operations  because  ALA  products  could  come on the  market  which  would not
infringe our patents but would compete with our Levulan(R)  products even though
they arE marketed for different uses.

      While we attempt to protect our  proprietary  information as trade secrets
through   agreements  with  each  employee,   licensing   partner,   consultant,
university,  pharmaceutical  company and agent,  we cannot  guarantee that these
agreements will provide effective protection for our proprietary information. It
is possible that:

      o     these persons or entities might breach the agreements,

      o     we might not have adequate remedies for a breach, and/or

      o     our competitors will independently develop or otherwise discover our
            trade secrets.

      PATENT  LITIGATION  IS  EXPENSIVE,  AND WE MAY NOT BE ABLE TO  AFFORD  THE
      COSTS.

      The costs of litigation  or any  proceeding  relating to our  intellectual
property rights could be substantial even if resolved in our favor.  Some of our
competitors  have far  greater  resources  than we do and may be better  able to
afford  the  costs  of  complex  patent  litigation.  For  example,  third-party
competitors may infringe one or more of our patents, and we could be required to
spend  significant  resources to enforce our patent rights.  Also, if we were to
sue a third-party  for  infringement  of our patents in the United States,  that
third-party  could challenge the validity of our patent(s).  We cannot guarantee
that a third-party will not claim, with or without merit, that we have infringed
their patent(s) or misappropriated  their proprietary  material.  Defending this
type of legal action involves  considerable  expense and could negatively affect
our financial results.


                                       33



      Additionally,  if a  third-party  were  to  file a  United  States  patent
application,  or be issued a patent claiming  technology also claimed by us in a
pending  United  States  application(s),  we may be required to  participate  in
interference  proceedings  in the United States  Patent and Trademark  Office to
determine  the  priority of  invention.  A  third-party  could also  request the
declaration of a patent interference  between one of our issued U.S. patents and
one of its  patent  applications.  Any  interference  proceedings  likely  would
require  participation by us and/or PARTEQ, could involve substantial legal fees
and result in a loss or lessening of our patent protection.

WE HAVE ONLY TWO THERAPIES THAT HAVE RECEIVED  REGULATORY  APPROVAL OR CLEARANCE
AND WE CANNOT PREDICT  WHETHER WE WILL EVER DEVELOP OR  COMMERCIALIZE  ANY OTHER
PRODUCTS.

      EXCEPT FOR THE LEVULAN(R) KERASTICK(R) WITH THE BLU-U(R) TO TREAT AKS, AND
      THE USE OF THE BLU-U(R) ALONE TO TREAT MODERATE  INFLAMMATORY ACNE, ALL OF
      OUR POTENTIAL  PRODUCTS ARE IN EARLY STAGES OF  DEVELOPMENT  AND MAY NEVER
      RESULT IN ANY COMMERCIALLY SUCCESSFUL PRODUCTS.

      We do  not  know  if  any  of  our  products  will  ever  be  commercially
successful.  Currently, we are developing a single drug compound, ALA, under the
trademark  Levulan(R),  with light for a number of different medical  conditions
using  photodynamic  therapy,  oR PDT. To be  profitable,  we must  successfully
research,  develop,  obtain  regulatory  approval for,  manufacture,  introduce,
market and  distribute our products.  Except for DUSA's two approved  therapies,
all of our other  potential  products are at an early stage of  development  and
subject  to  the  risks  of  failure   inherent  in  the   development   of  new
pharmaceutical  products and  products  based on new  technologies.  These risks
include:

      o     delays in product development, clinical testing or manufacturing,

      o     unplanned  expenditures in product development,  clinical testing or
            manufacturing,

      o     failure  in  clinical  trials  or  failure  to  receive   regulatory
            approvals,

      o     emergence of superior or equivalent products,

      o     inability to market products due to third-party  proprietary rights,
            and

      o     failure to achieve market acceptance.

      We cannot  predict how long the  development  for our early stage products
will take or whether they will be medically effective.  We cannot be sure that a
successful market will ever develop for our drug technology.


                                       34



      WE MUST  RECEIVE  SEPARATE  APPROVAL  FOR EACH OF OUR  POTENTIAL  PRODUCTS
      BEFORE WE CAN SELL THEM COMMERCIALLY IN THE UNITED STATES OR ABROAD.

      All of our potential  Levulan(R) products will require the approval of the
FDA before they can be marketed in the UniteD  States.  If we fail to obtain the
required  approvals for these  products our revenues will be limited.  Before an
application to the FDA seeking approval to market a new drug, called an NDA, can
be filed, a product must undergo,  among other things,  extensive animal testing
and human  clinical  trials.  The  process of  obtaining  FDA  approvals  can be
lengthy,  costly,  and  time-consuming.  Following the acceptance of an NDA, the
time  required for  regulatory  approval can vary and is usually 1 to 3 years or
more. The FDA may require additional animal studies and/or human clinical trials
before  granting  approval.  Our  Levulan(R)  PDT  products  are  based  on  neW
technology.  To the best of our knowledge, the FDA has approved only 3 drugs for
use in photodynamic therapy, including Levulan(R).  This factor may lengthen the
approval  process.  We face much  trial  and  error and we may fail at  numerous
stages along the way.

      We cannot predict whether we will obtain approval for any of our potential
products.  Data obtained  from  preclinical  testing and clinical  trials can be
susceptible  to varying  interpretations  which  could  delay,  limit or prevent
regulatory approvals. Future clinical trials may not show that Levulan(R) PDT or
photodetection,  known  as PD,  is  safe  and  effective  for any new use we are
studying.  In addition,  delays or  disapprovals  may be encountered  based upon
additional   governmental   regulation  resulting  from  future  legislation  or
administrative  action or changes in FDA  policy.  We must also  obtain  foreign
regulatory  clearances  before we can market any  potential  products in foreign
markets.  The foreign  regulatory  approval  process  includes  all of the risks
associated  with  obtaining  FDA marketing  approval and may impose  substantial
additional costs.

      IF WE ARE UNABLE TO OBTAIN THE NECESSARY  CAPITAL TO FUND OUR  OPERATIONS,
      WE WILL  HAVE TO DELAY  OUR  DEVELOPMENT  PROGRAMS  AND MAY NOT BE ABLE TO
      COMPLETE OUR CLINICAL TRIALS.

      Since our sales goals for our  products  have not been met, and may not be
met in the future,  we may need  substantial  additional funds to fully develop,
manufacture,  market and sell our other potential  products.  In addition to the
funds we recently  received in connection  with a private  placement in February
2004, we may obtain funds through other public or private financings,  including
equity financing, and/or through collaborative  arrangements.  We cannot predict
whether any financing will be available on acceptable terms.

      Dependent  on the extent of available  funding,  we may continue to delay,
reduce in scope or eliminate some of our research and development programs as we
did in  2003.  We may  also  choose  to  license  rights  to  third  parties  to
commercialize products or technologies that we would otherwise have attempted to
develop and commercialize on our own which could reduce our potential revenues.


                                       35



BECAUSE OF THE NATURE OF OUR BUSINESS, THE LOSS OF KEY MEMBERS OF OUR MANAGEMENT
TEAM COULD DELAY ACHIEVEMENT OF OUR GOALS.

      We are a small company with only 51 employees.  We are highly dependent on
several key officer/employees  with specialized  scientific and technical skills
without whom our business,  financial  condition and results of operations would
suffer. The photodynamic therapy industry is still quite small and the number of
experts is limited.  The loss of these key  employees  could  cause  significant
delays in  achievement  of our business and research goals since very few people
with their expertise could be hired.  Our growth and future success will depend,
in large part, on the continued  contributions  of these key individuals as well
as our ability to motivate and retain other qualified personnel in our specialty
drug and light device areas.


                          RISKS RELATED TO OUR INDUSTRY

PRODUCT LIABILITY AND OTHER CLAIMS AGAINST US MAY REDUCE DEMAND FOR OUR PRODUCTS
OR RESULT IN DAMAGES.

      WE HAVE HAD A LAWSUIT FILED AGAINST US BASED ON A PRODUCT  LIABILITY CLAIM
      WHICH,  REGARDLESS  OF MERIT,  COULD RESULT IN A DAMAGE AWARD FOR WHICH WE
      MAY NOT HAVE ADEQUATE INSURANCE COVERAGE.

      The  development,  manufacture and sale of medical  products exposes us to
product  liability claims related to the use or misuse of our products.  Product
liability  claims  can be  expensive  to defend  and may  result in  significant
judgments against us. On January 29, 2004, we were served with a complaint filed
in the State of Michigan  Circuit Court for the County of Oakland.  The case has
been removed to the U.S. District Court, Eastern District of Michigan,  Southern
Division.  The complaint alleges  unspecified  damages suffered by the plaintiff
arising from recurrence of epileptic or similar seizures  following  exposure to
the BLU-U(R). We are unable to predict the outcome of this litigation.  Although
we currently  maintain product liability  insurance for coverage of our products
in amounts we believe to be  commercially  reasonable  we cannot be certain that
the coverage amounts are adequate. A successful claim in excess of our insurance
coverage could materially harm our business,  financial condition and results of
operations.  Additionally,  we cannot guarantee that continued product liability
insurance  coverage will be available in the future at acceptable  costs. If the
cost is too high, we may have to self-insure.


                                       36



      OUR BUSINESS  INVOLVES  ENVIRONMENTAL  RISKS AND WE MAY INCUR  SIGNIFICANT
      COSTS COMPLYING WITH ENVIRONMENTAL LAWS AND REGULATIONS.

      We have used various hazardous  materials,  such as mercury in fluorescent
tubes in our research  and  development  activities.  We are subject to federal,
state and local laws and regulations which govern the use, manufacture, storage,
handling and disposal of hazardous  materials and specific waste  products.  Now
that we have  established  our own  production  line for the  manufacture of the
Kerastick(R),  we are subject to additional  environmental laws and regulations.
We believe that we are in  compliance in all material  respects  with  currently
applicable environmental laws and regulations. However, we cannot guarantee that
we will not  incur  significant  costs to  comply  with  environmental  laws and
regulations  in the future.  We also  cannot  guarantee  that  current or future
environmental  laws or  regulations  will not  materially  adversely  affect our
operations,  business  or assets.  In  addition,  although we believe our safety
procedures  for handling and disposing of these  materials  comply with federal,
state and local laws and regulations, we cannot completely eliminate the risk of
accidental contamination or injury from these materials. In the event of such an
accident,  we could be held liable for any resulting damages, and this liability
could exceed our resources.

WE MAY NOT BE ABLE TO COMPETE AGAINST  TRADITIONAL  TREATMENT METHODS OR KEEP UP
WITH RAPID CHANGES IN THE BIOTECHNOLOGY AND PHARMACEUTICAL INDUSTRIES THAT COULD
MAKE SOME OR ALL OF OUR PRODUCTS NON-COMPETITIVE OR OBSOLETE.

      COMPETING PRODUCTS AND TECHNOLOGIES BASED ON TRADITIONAL TREATMENT METHODS
      MAY MAKE SOME OR ALL OF OUR PROGRAMS OR POTENTIAL PRODUCTS  NONCOMPETITIVE
      OR OBSOLETE.

      Well-known  pharmaceutical,   biotechnology  and  chemical  companies  are
marketing  well-established  therapies  for the  treatment  of many of the  same
conditions we are seeking to treat  including AKs, acne,  photodamaged  skin and
Barrett's  esophagus.  Doctors may prefer to use familiar  methods,  rather than
trying  our   products.   Reimbursement   issues   may   affect   the   economic
competitiveness of our products as compared to other more traditional therapies.

      Many companies are also seeking to develop new products and  technologies,
and  receiving  approval  for  medical  conditions  for which we are  developing
treatments.  Our  industry is subject to rapid,  unpredictable  and  significant
technological  change.  Competition is intense.  Our  competitors may succeed in
developing  products  that are safer or more  effective  than ours.  Many of our
competitors  have  substantially  greater  financial,  technical  and  marketing
resources  than  we  have.  In  addition,   several  of  these   companies  have
significantly  greater experience than we do in developing products,  conducting
preclinical and clinical  testing and obtaining  regulatory  approvals to market
products for health care.


                                       37



      We  cannot  guarantee  that  new  drugs  or  future  developments  in drug
technologies will not have a material adverse effect on our business.  Increased
competition could result in:

      o     price reductions,

      o     lower levels of third-party reimbursements,

      o     failure to achieve market acceptance, and

      o     loss of market share,

any of which could adversely  affect our business.  Further,  we cannot give any
assurance that  developments by our competitors or future  competitors  will not
render our technology obsolete.

      OUR  PDT  /  PD  COMPETITORS  IN  THE  BIOTECHNOLOGY  AND   PHARMACEUTICAL
      INDUSTRIES  MAY  HAVE  BETTER  PRODUCTS,   MANUFACTURING  CAPABILITIES  OR
      MARKETING EXPERTISE.

      We anticipate  that we will face  increased  competition as the scientific
development  of PDT/PD  advances and new  companies  enter our markets.  Several
companies are developing PDT agents other than  Levulan(R).  These include:  QLT
PhotoTherapeutics  Inc.  (Canada);  Axcan  Pharma Inc.  (U.S.);  Miravant,  Inc.
(U.S.); and  Pharmacyclics,  Inc. (U.S.). We are also aware of several companies
commercializing  and/or conducting  research with ALA or ALA-related  compounds,
including:  medac GmbH and Photonamic GmbH & Co. KG (Germany); and PhotoCure ASA
(Norway)  which  entered  into a marketing  agreement  with  Galderma  S.A.  for
countries outside of Nordic countries for certain dermatology indications.

      PhotoCure  has  received  marketing  approval  of its ALA  precursor  (ALA
methyl-ester)  compound for PDT treatment of AKs and basal cell carcinoma in the
European Union, New Zealand,  Australia and countries in Scandinavia.  PhotoCure
has also filed for regulatory approvals in the United States, and has received a
notice of approvability  from the FDA for its AK product.  If PhotoCure receives
FDA product  approval in the United  States and  successfully  enters the United
States  marketplace,  its product  will  represent  direct  competition  for our
products.

      Axcan Pharma Inc. has announced  that it has received FDA approval for the
use of its  product,  PHOTOFRIN(R),  for  PDT in the  treatment  of  high  grade
dysplasia  associated  with Barrett's  esophagus.  Axcan is the first company to
market a PDT therapy for this indication, which we are also pursuing.

      We  expect  that our  principal  methods  of  competition  with  other PDT
companies will be based upon such factors as:

      o     the ease of administration of our method of PDT,

      o     the degree of generalized skin sensitivity to light,


                                       38



      o     the number of required doses,

      o     the  selectivity  of our drug for the  target  lesion  or  tissue of
            interest, and

      o     the type and cost of our light systems.


                           RISKS RELATED TO OUR STOCK

IF OUTSTANDING  OPTIONS,  WARRANTS AND RIGHTS ARE CONVERTED,  THE VALUE OF THOSE
SHARES OF COMMON STOCK OUTSTANDING JUST PRIOR TO THE CONVERSION WILL BE DILUTED.

      As of March 1,  2004  there  were  outstanding  options  and  warrants  to
purchase  2,709,825  shares of common stock,  with exercise  prices ranging from
U.S.  $1.60 to $31.00 per share,  and ranging  from CDN $4.69 to CDN $10.875 per
share, respectively.  In addition, DUSA granted investors of a private placement
rights to purchase up to an aggregate of an additional  337,500 shares of common
stock at $11.00 per share.  These additional  investment rights expire April 14,
2004,  or 30 trading  days from the  closing  of the  private  placement,  which
occurred on March 2, 2004. If the holders exercise a significant number of these
securities at any one time, the market price of the common stock could fall, and
the value of the common stock held by other shareholders  would be diluted.  The
holders of the options,  warrants and rights have the  opportunity  to profit if
the market  price for the  common  stock  exceeds  the  exercise  price of their
respective securities,  without assuming the risk of ownership.  The holders are
likely to  exercise  their  securities  when we would  probably be able to raise
capital  from the public on terms more  favorable  than those  provided in these
securities.

RESULTS OF OUR OPERATIONS AND GENERAL MARKET CONDITIONS FOR BIOTECHNOLOGY  STOCK
COULD RESULT IN THE SUDDEN CHANGE IN THE MARKET VALUE OF OUR STOCK.

      The price of our common stock has been highly volatile. These fluctuations
create a greater risk of capital losses for our shareholders as compared to less
volatile stocks.  From January 1, 2003 to March 10, 2004, the price of our stock
has ranged from a low of $1.40 to a high of $14.87.  Factors that contributed to
the volatility of our stock during the last 12 months included:

      o     levels of product sales,

      o     general market conditions,

      o     increased marketing activities,

      o     changes in third-party payor reimbursement for our therapy, and

      o     failure to close a strategic partnership for Barrett's esophagus.


                                       39



      The significant general market volatility in similar stage  pharmaceutical
and biotechnology  companies made the market price of our common stock even more
volatile.

IF OUR MARKET  CAPITALIZATION FALLS BACK TO A LEVEL SIGNIFICANTLY BELOW OUR CASH
VALUE, WE COULD BE SUBJECT TO A TENDER OFFER THAT DOES NOT REFLECT THE POTENTIAL
VALUE OF OUR BUSINESS AND COULD MINIMIZE THE RETURN TO OUR SHAREHOLDERS ON THEIR
INVESTMENTS.

      The  price  of  our  common   stock  has  been   negatively   impacted  by
disappointing  product  sales,  the  termination of our  dermatology  marketing,
development and supply agreement in late 2002,  general market  conditions,  and
the limited  acceptance  of the value of our therapy.  Based on this,  our share
price traded at a level below our cash value  during much of 2003.  If our share
price  again  falls  below  our cash  value,  there  may be a risk of  companies
offering  to acquire us at reduced  values  which do not  reflect  the  business
potential of our assets.

EFFECTING A CHANGE OF CONTROL OF DUSA WOULD BE DIFFICULT,  WHICH MAY  DISCOURAGE
OFFERS FOR SHARES OF OUR COMMON STOCK.

      Our  certificate  of  incorporation  authorizes  the board of directors to
issue up to 100,000,000  shares of stock,  40,000,000 of which are common stock.
The board of  directors  has the  authority  to  determine  the  price,  rights,
preferences and privileges, including voting rights, of the remaining 60,000,000
shares without any further vote or action by the shareholders. The rights of the
holders of our common  stock will be subject to, and may be  adversely  affected
by, the rights of the holders of any  preferred  stock that may be issued in the
future.

      On September 27, 2002,  we adopted a shareholder  rights plan at a special
meeting of DUSA's board of directors. The rights plan could discourage, delay or
prevent a person or group from acquiring 15% or more (or 20% or more in the case
of certain parties) of our common stock, thereby limiting,  perhaps, the ability
of our shareholders to benefit from such a transaction.

      The rights plan provides for the  distribution  of one right as a dividend
for each  outstanding  share of our  common  stock to  holders  of  record as of
October 10,  2002.  Each right  entitles the  registered  holder to purchase one
one-thousandths of a share of preferred stock at an exercise price of $37.00 per
right.  The rights will be  exercisable  subsequent to the date that a person or
group  either has  acquired,  obtained  the right to acquire,  or  commences  or
discloses an intention to commence a tender offer to acquire, 15% or more of our
outstanding  common stock (or 20% of the outstanding common stock in the case of
a  shareholder  or group who  beneficially  held in excess of 15% at the  record
date), or if a person or group is declared an "Adverse Person",  as such term is
defined in the rights  plan.  The rights may be redeemed by DUSA at a redemption
price of one one-hundredth of a cent per right until ten days following the date
the person or group acquires,  or discloses an intention to acquire,  15% or 20%
or more,  as the  case may be,  of DUSA,  or  until  such  later  date as may be
determined by the our board of directors.


                                       40



      Under the rights plan, if a person or group acquires the threshold  amount
of common  stock,  all  holders of rights  (other than the  acquiring  person or
group) may, upon payment of the purchase price then in effect,  purchase  shares
of common stock of DUSA having a value of twice the purchase price. In the event
that we are involved in a merger or other similar  transaction where DUSA is not
the  surviving  corporation,  all holders of rights  (other  than the  acquiring
person or group) shall be entitled,  upon payment of the purchase  price then in
effect, to purchase common stock of the surviving  corporation having a value of
twice the purchase  price.  The rights will expire on October 10,  2012,  unless
previously redeemed.  Our board of directors has also adopted certain amendments
to DUSA's  certificate of incorporation  consistent with the terms of the rights
plan.

ITEM 2. PROPERTIES

      In May 1999 we  entered  into a five year  lease  for  16,000  sq.  ft. of
office/warehouse  space to be used for offices and  manufacturing in Wilmington,
Massachusetts.  On  February 1, 2001,  we entered  into a five year lease for an
additional  24,000 square feet of space at our Wilmington  facility.  As part of
our planned  build-out of the  facility,  in December 2001 we replaced the two 5
year  leases  with a new 15 year  lease  covering  the entire  building  through
November 2016. We have the ability to terminate the  Wilmington  lease after the
10th year (2011) of the lease by providing  the landlord  with notice at least 7
and  one-half  months  prior  to the  date on  which  the  termination  would be
effective.  In October  2002, we entered into a five year lease  commitment  for
approximately  2,000  square  feet,  for  our  wholly-owned   subsidiary,   DUSA
Pharmaceuticals  New York, Inc.,  replacing the space DUSA previously  occupied.
Commencing  in August  2002,  we entered  into a five year  lease for  different
office space for our Toronto  location.  This facility  accommodates the Toronto
office of our President and shareholder services representative. See "Note 15(b)
to the Company's Notes to the Consolidated Financial Statements".

ITEM 3. LEGAL PROCEEDINGS

      In April 2002,  we received a copy of a notice  issued by PhotoCure ASA to
Queen's  University at Kingston,  Ontario,  alleging that Australian  Patent No.
624985 is invalid. Australian Patent No. 624985 is one of the patents covered by
our agreement  with PARTEQ  Research & Development  Innovations,  the technology
transfer  arm  of  Queen's  University,   relating  to   5-aminolevulinic   acid
technology.  PhotoCure  instituted  this  proceeding  on April  12,  2002 in the
Federal Court of Australia, Victoria District Registry. As a consequence of this
action,  Queen's  University has assigned the Australian patent to us so that we
may participate  directly in this  litigation.  We filed an answer setting forth
our defenses and a related  countersuit  alleging  that  PhotoCure's  activities
infringe  the  patent.  The case is ongoing  and we are  unable to  predict  the
outcome at this time.  DUSA believes that the final hearing in the Federal Court
of Australia will occur in April 2004.

                                       41



      In March 2003, we received  notice that our  Netherlands  patent was being
formally challenged by an anonymous agent, and we filed a formal response to the
opposition.  The  Netherlands  Patent Office has issued a notice that the patent
was upheld and granted in amended  form on February  10,  2004.  The  opponent's
right to appeal has  expired.  See  section  entitled  "Business  - Patents  and
Trademarks;  and - Competition ". For other patent matters, see section entitled
"Risk Factors - If we are unable to protect our  proprietary  technology,  trade
secrets or know-how, we may not be able to operate our business profitably".

      In December 2003,  DUSA was served with a complaint  filed in the State of
Michigan Circuit Court for the County of Oakland  alleging,  among other things,
that  DUSA's  BLU-U(R)  caused  the  plaintiff  to suffer a seizure  during  the
performance  of her duties as an office  assistant.  The complaint  names Berlex
Laboratories,  Inc., a subsidiary of our former  marketing  partner,  as another
defendant.  The damages are  unspecified.  The case has been removed to the U.S.
District Court, Eastern District of Michigan, Southern Division. While it is not
possible to predict or determine the outcome of this action, we believe that the
costs  associated with all such matters will not have a material  adverse effect
on our  consolidated  financial  position  or  liquidity  but could  possibly be
material  to the  consolidated  results of  operations  in any one period to the
extent costs are not covered by our insurance.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

      None.


                                       42



                                     PART II


ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS

      Our common stock is traded on the NASDAQ  National Market under the symbol
"DUSA." The following  are the high and low closing  prices for the common stock
reported for the quarterly periods shown.


Price range per common share by quarter, 2002:


                       First            Second          Third           Fourth
                       -----            ------          -----           ------
NASDAQ
High                  $   7.83        $   4.55        $   2.69        $   1.89
Low                       3.79            1.84            1.40            1.32

Price range per common share by quarter, 2003:

                       First            Second          Third           Fourth
                       -----            ------          -----           ------
NASDAQ
High                  $   1.77        $   3.16        $   6.45        $   6.44
Low                       1.45            1.75            2.50            4.50


      On March 10,  2004,  the closing  price of our common stock was $10.02 per
share on the NASDAQ National  Market.  On March 10, 2004, there were 678 holders
of record of our common stock.

      We have never paid cash  dividends on our common stock and have no present
plans to do so in the foreseeable future.



                                       43



ITEM 6. SELECTED FINANCIAL DATA

      The following information should be read in conjunction with the Company's
Consolidated  Financial  Statements  and  the  Notes  thereto  and  Management's
Discussion  and  Analysis  of  Financial  Condition  and  Results of  Operations
included  elsewhere in this report.  The selected financial data set forth below
has been derived from the Company's audited consolidated financial statements.

CONSOLIDATED STATEMENTS OF OPERATIONS DATA




                                                                               Year ended December 31,
                                                  ---------------------------------------------------------------------------
                                                      2003           2002 (1)        2001            2000            1999
                                                  ------------    ------------   ------------    ------------    ------------
                                                                                                  
Revenues (1)                                      $    970,109    $ 25,483,238   $  5,390,736    $  2,120,557    $         --
Cost of product sales and royalties (1)              3,481,248       5,253,424      2,148,994       1,104,664              --
Research and development costs (1)                   5,403,961      12,121,606     10,789,906       8,163,419       4,194,532
Marketing and sales costs                            2,494,405              --             --              --              --
General and administrative costs                     6,343,680       5,591,039      3,654,792       2,615,502       1,818,193
Income (loss) from operations                      (16,753,185)      2,517,169    (11,202,956)     (9,763,028)     (6,012,725)
Other income, net                                    1,926,331       3,245,349      3,844,860       3,222,273         574,098
Income tax expense                                          --              --             --              --          90,000
Net income (loss)                                  (14,826,854)      5,762,518     (7,358,096)     (6,540,755)     (5,528,627)
Basic and diluted net income  (loss) per common
   share                                          $      (1.06)   $       0.42   $      (0.53)   $      (0.49)   $      (0.50)
Weighted average number of shares outstanding       13,936,482      13,877,566     13,791,735      13,285,472      11,061,016



CONSOLIDATED BALANCE SHEETS DATA



                                                                     As of December 31,
                                       ---------------------------------------------------------------------------
                                          2003            2002             2001            2000            1999
                                       -----------     -----------     -----------     -----------     -----------
                                                                                        
Total assets                           $44,697,488     $60,949,973     $75,864,221     $82,442,388     $28,156,845
Cash and investment securities (2)      37,969,476      52,879,543      64,709,625      74,496,577      26,897,580
Deferred revenue (1)                       129,900           5,100      22,585,856      24,805,041       9,791,667
Long-term debt (3)                       1,247,500       1,517,500              --              --              --
Shareholders' equity                    40,232,049      56,057,730      49,834,537      55,309,796      17,059,928



(1)   2002 includes the  recognition of  approximately  $20,990,000 in revenues,
      $2,638,000  in  cost  of  product  sales  and  $639,000  in  research  and
      development costs as a result of the termination of our former dermatology
      collaboration  arrangement.  See section entitled  "Results of Operations,
      2002 Dermatology Collaboration Termination". These amounts were previously
      deferred and were being  amortized into  operations  over periods  ranging
      from 1 to 12.5 years.

(2)   Includes restricted cash and investment securities classified as long-term
      assets.

(3)   Excludes current portion of long-term debt.



                                       44



ITEM 7. MANAGEMENT'S  DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATIONS

      When you read this section of this report,  it is important  that you also
read the  financial  statements  and related  notes  included  elsewhere in this
report. This section contains forward-looking  statements that involve risks and
uncertainties.  Our  actual  results  could  differ  materially  from  those  we
anticipate in these forward-looking  statements for many reasons,  including the
factors described below and in "Risk Factors".

OVERVIEW

      DUSA  is a  pharmaceutical  company  engaged  primarily  in the  research,
development,  and marketing of a drug named  5-aminolevulinic acid, or ALA, used
in  combination  with  appropriate  light  devices in order to detect or treat a
variety of medical conditions. The trademark for our brand of ALA is Levulan(R).
When  Levulan(R)  is used and  followed  with  exposure  to light to  produce  a
therapeutic effect, the technology is called photodynamic  therapy, or PDT. When
Levulan(R)  is used and  followed  with  exposure  to light  to  detect  medical
conditions, the technology is called photodetection,  or PD. Our products, which
were launched in September 2000 in the United States, are Levulan(R) 20% topical
solution using our Kerastick(R)  brand applicator,  and our BLU-U(R) brand light
unit.  Our  products  are used  together  to provide  PDT for the  treatment  of
non-hyperkeratotic actinic keratoses, or AKs, of the face or scalp. In addition,
we  received  market  clearance  from the FDA in  September  2003 to market  the
BLU-U(R)  without  Levulan(R)  for the treatment of moderate  inflammatory  acne
vulgaris.

      We have primarily  devoted our resources to fund research and  development
in order to advance the Levulan(R) PDT/PD technology  platform and, as a result,
we have experienced  significant  operating  losses. As of December 31, 2003, we
had an accumulated deficit of approximately  $58,910,000.  Achieving our goal of
becoming a profitable  operating  company is dependent  upon  acceptance  of our
therapy by the medical and consumer  constituencies,  and our ability to develop
new products.

      During 2003, we implemented our new sales, marketing, physician education,
and development  strategies  following the  reacquisition of our rights from our
former marketing partner in September 2002. The October 1, 2003 launch of DUSA's
initial sales force and related  marketing and sales  activities has resulted in
significant  additional  expenses.  However,  the impact on sales was  positive.
Kerastick(R)  unit sales to end-users were 11,172 for 2003, as compared to 7,116
for 2002,  with fourth quarter 2003 sales totaling 5,478 as compared to 1,722 in
the fourth quarter 2002. Although the costs related to the addition of our sales
force and related  marketing  activities  are  currently  greater than the gross
profit  generated from the increased  sales,  we are encouraged with the initial
increase in sales,  and will  continue our efforts to penetrate  the market.  We
expect  to  continue  to incur  operating  losses  until  sales of our  products
increase substantially.  See section entitled "Results of Operations - Marketing
and  Sales  Costs".  At this  time,  our core  objectives  include  focusing  on
increasing  sales in the United States,  conducting  clinical  trials which,  if
successful,  could lead to  additional  dermatology  indications,  and seeking a
partner to help develop and market Levulan(R) PDT for the treatment of dysplasia
in  patients  with  Barrett's  esophagus.  In  addition,  we continue to support
independent investigator trials to advance research in the use and applicability
of Levulan(R) PDT for other indications in dermatology.


                                       45



      We have continued to support  efforts to improve  reimbursement  levels to
physicians.  Such  efforts  included  working  with the Centers for Medicare and
Medicaid  Services  (CMS) to  reverse  the  bundling  of the drug  cost with the
procedure fee, which had occurred effective March 1, 2003. In November 2003, CMS
agreed to reinstate the code for  physicians to bill the drug cost separate from
the procedure fee. As a result,  effective  January 1, 2004, there is a separate
code for the costs of the Levulan(R)  Kerastick(R),  and a revised reimbursement
code for the  BLU-U(R)  application  procedure.  Doctors  can also  bill for any
applicable visit fees. However, some physicians have suggested that even the new
reimbursement  levels do not fully  reflect the  required  efforts to  routinely
employ our therapy in their  practices.  These issues have affected the economic
competitiveness  of our products with other AK therapies and hence have hindered
the  adoption of our therapy.  In  addition,  we continue to work to educate the
major  private  insurance  carriers  such that they will approve our therapy for
coverage.  As of December 31, 2003, several major private insurers have approved
coverage for our AK therapy.  We believe that due to these  efforts,  along with
our education and marketing  programs,  more widespread  adoption by the medical
community should occur over time. In addition, we are aware that some physicians
have been using  Levulan(R)  with light devices  manufactured by other companies
and for uses other than our  FDA-approved  use.  While we are not  permitted  to
market our products for so-called  "off-label" uses, these activities could also
positively affect the use of our products.

      We have been encouraged by the positive  response from many physicians and
patients who have used our therapy,  but recognize  that we have to  demonstrate
the clinical value of our unique therapy,  and the related  product  benefits as
compared  to other  well-established  conventional  therapies,  in order for the
medical  community to accept our products on a large  scale.  We also  recognize
that market acceptance has taken longer than we originally anticipated, and that
product sales have not reached the levels that were originally  expected.  While
our  financial  position is strong,  we cannot  predict when  product  sales may
offset the costs associated with these efforts.

      As of December 31, 2003,  we had a staff of 50 full-time  employees  and 1
part-time  employee,  as compared to 43 full-time  employees at the end of 2002,
including marketing and sales,  production,  maintenance,  customer support, and
financial  operations  personnel,  as well as those  who  support  research  and
development programs for dermatology and internal indications.

RECENT EVENTS

      FEBRUARY 2004 PRIVATE  PLACEMENT - On February 27, 2004, DUSA entered into
definitive  agreements  with  certain new and existing  institutional  and other
accredited investors for the private placement of 2,250,000 shares of our common
stock at a purchase  price of $11.00 per share  resulting  in gross  proceeds to
DUSA of $24,750,000.  DUSA has granted the investors the right to purchase up to
an  aggregate  of an  additional  337,500  shares of common  stock at $11.00 per
share.  These additional  investment rights expire April 14, 2004, or 30 trading
days from  closing,  which  occurred  on March 2, 2004.  The  placement  agent's
commission  and  non-refundable  retainer  was paid in 135,000  shares of common
stock calculated at the offering price.


                                       46



      DUSA will use the proceeds  from the sale of the  securities to expand our
sales force and for general working  capital  purposes,  including  research and
development activities.

      RE-ACQUISITION  OF CANADIAN  PRODUCT  RIGHTS - On February 24, 2004,  DUSA
reacquired the rights to the  aminolevulinic  acid  (Levulan(R))  technology for
Canada  held by Draxis  Health Inc.  ("Draxis").  These  rights  were  initially
assigned to Draxis in 1991 at the time of the original  licensing of the patents
underlying  our  Levulan(R)  PDT platform from PARTEQ  Research and  Development
Innovations,  the licensing arm of Queen's University,  Kingston,  Ontario. DUSA
and Draxis terminated the assignment and DUSA agreed to pay to Draxis an upfront
fee and a royalty on sales of the Levulan(R)  Kerastick(R) in Canada over a five
year term. The commercial  launch of our products in Canada is expected to occur
in 2004.

      MANUFACTURING  FACILITY  APPROVAL - On July 14,  2003,  DUSA  received FDA
approval to manufacture the Levulan(R)  Kerastick(R) at our Wilmington facility,
and in February 2004 we commenced manufacturing Kerastick(R) units in support of
our plan to maintain an adequate  supply of inventory to meet market  demand for
our products based on sales projections.  As of December 31, 2003, we had 30,144
Kerastick(R)  units in  inventory.  This  inventory  was produced in 2002 by our
former  third-party  manufacturer to meet product demand during the execution of
our  project  to  complete  construction  and  gain  FDA  approval  of  our  new
manufacturing  facility.  The facility  will also be utilized in 2004 to produce
clinical  supplies  for  our  planned  DUSA-sponsored  studies  in  addition  to
investigator studies which DUSA plans to support.

      THIRD-PARTY  DISTRIBUTION  AGREEMENT - Effective  December 10, 2003,  DUSA
amended its  agreement  with Moore  Medical  Corporation  ("Moore"),  a national
distributor and marketer of medical and surgical supplies,  to eliminate Moore's
exclusivity  rights and allow DUSA to use other third-party  distributors of the
Kerastick(R) in the United States. Since that time, two additional  distributors
have been appointed. In addition, distributors have also been authorized to sell
the  BLU-U(R)  on DUSA's  behalf.  Distributors  have the right to return  their
inventory  of  Kerastick(R)  units for full credit for a period of time prior to
and after the expiration date of their respective agreements.

      510(K) FDA FILING - On September 9, 2003, DUSA received  market  clearance
from the FDA to market the  BLU-U(R)  without  Levulan(R)  for the  treatment of
moderate  inflammatory acne vulgaris. We initiated the marketing of the BLU-U(R)
for this  indication  in the fourth  quarter of 2003.  Although  direct sales of
BLU-U(R)  commenced  in  November  2003,  the overall  impact  that  selling the
BLU-U(R) for the  treatment  of acne will have on product  sales is uncertain at
this time.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

      Critical  accounting  policies  are  those  that  require  application  of
management's most difficult,  subjective or complex judgments, often as a result
of the need to make  estimates  about the effect of matters that are  inherently
uncertain and may change in subsequent periods and that can significantly affect
our financial  position and results of operations.  Our accounting  policies are
disclosed in Note 2 to the Notes to the Consolidated  Financial  Statements.  We
have  discussed  these  policies and the  underlying  estimates used in applying
these  accounting  policies  with our  Audit  Committee.  Since not all of these
accounting policies require management to make difficult,  subjective or complex
judgments  or  estimates,  they  are  not  all  considered  critical  accounting
policies. We consider the following policies and estimates to be critical to our
financial statements.


                                       47



      REVENUE  RECOGNITION  - Revenues  on  product  sales are  recognized  when
persuasive  evidence  of an  arrangement  exists,  the price is fixed and final,
delivery has  occurred,  and there is  reasonableness  of  collection.  Research
revenue  previously  earned  under  our  collaborative  agreement  consisted  of
non-refundable  research and  development  funding  from our former  dermatology
collaboration  partner.  Research revenue generally compensated us for a portion
of our  agreed-upon  research and  development  expenses and was  recognized  as
revenue at the time the research and development activities were performed under
the terms of the related agreements and when no future  performance  obligations
existed. Milestone or other up-front payments are typically recorded as deferred
revenue  upon receipt and  recognized  as earned,  generally on a  straight-line
basis over the term of an agreement.  Under the terms of our former  dermatology
collaboration  agreement, we initially estimated a 12 1/2 year life, the term of
the  agreement.  As a result of the  termination  of that agreement in 2002, the
estimated  period  over  which  we  were  recognizing  revenue  ceased  and  the
unamortized   deferred  revenue  of  $20,990,000  was  accelerated.   Since  the
termination  of the former  collaboration  agreement,  we have been  selling our
products through distributors who have a general right of return of product and,
accordingly,  we have  deferred  such  revenue  until the product is sold by our
distributors  to the end user.  Although  we make  every  effort  to assure  the
reasonableness  of  our  estimates,  significant  unanticipated  changes  in our
estimates due to business,  economic,  or industry  events could have a material
impact on our results of operations.

      In December 2003, the  Securities and Exchange  Commission  released Staff
Accounting Bulletin No. 104 ("SAB 104"), Revenue Recognition.  SAB 104 clarifies
existing  guidance  regarding  revenues for  contracts  which  contain  multiple
deliverables  to make it consistent with Emerging Issues Task Force ("EITF") No.
00-21.  The adoption of SAB 104 did not have a material  impact on the Company's
financial position or results of operations.

      INVENTORY -  Inventories  are stated at the lower of cost or market value.
Cost is  determined  using  the  first-in,  first-out  method.  Inventories  are
continually reviewed for slow moving, obsolete and excess items. Inventory items
identified  as  slow-moving  are  evaluated  to determine  if an  adjustment  is
required.  Additionally,  our industry is characterized by regular technological
developments  that could  result in obsolete  inventory.  Although we make every
effort  to  assure  the   reasonableness  of  our  estimates,   any  significant
unanticipated  changes  in demand,  technological  development,  or  significant
changes to our business  model could have a  significant  impact on the value of
our inventory  and our results of  operations.  For example,  as a result of the
termination  of the  former  dermatology  collaboration  agreement  in 2002,  we
recorded lower of cost or market  adjustments of $2,095,000 for excess inventory
and  commercial  light units at that time. We use sales  projections to estimate
the  appropriate  level of  inventory  that  should  remain on the  Consolidated
Balance  Sheet.  Management  believes  that  the  recorded  inventory  value  is
reasonable  in light of our  current  sales  forecasts.  Should  we be unable to
achieve the forecasted sales,  additional adjustments may be recorded to cost of
goods sold.


                                       48


      VALUATION  OF  LONG-LIVED  AND  INTANGIBLE  ASSETS - We review  long-lived
assets for  impairment  whenever  events or changes  in  business  circumstances
indicate that the carrying amount of assets may not be fully recoverable or that
the useful lives of these assets are no longer  appropriate.  Factors considered
important which could trigger an impairment review include  significant  changes
relative to: (i) projected future operating results;  (ii) the use of the assets
or the strategy for the overall  business;  (iii) business  collaborations;  and
(iv) industry,  business,  or economic trends and developments.  Each impairment
test is based on a  comparison  of the  undiscounted  cash flow to the  recorded
value of the asset. If it is determined that the carrying value of long-lived or
intangible assets may not be recoverable based upon the existence of one or more
of the  above  indicators  of  impairment,  the  asset  is  written  down to its
estimated fair value on a discounted cash flow basis. In 2002 and again in 2003,
we  concluded  that the  termination  of our  former  dermatology  collaboration
agreement  in  September  2002 and current  business  events have not caused any
impairment to our manufacturing  facility. At December 31, 2003, total property,
plant  and  equipment  had  a  carrying  value  of  $4,251,000,   including  our
manufacturing  facility  which  received  FDA  approval  on July  14,  2003.  In
September  2002,  as a  result  of the  termination  of our  former  dermatology
collaboration  agreement,  we  recorded  impairment  adjustments  of  $1,182,000
related to certain  intangibles  assets  previously  recorded  in our  financial
statements.  We had no  intangible  assets  recorded as of December  31, 2003 or
2002.

      STOCK-BASED  COMPENSATION  - We  have  elected  to  continue  to  use  the
intrinsic  value-based  method to account for employee stock option awards under
the  provisions  of Accounting  Principles  Board Opinion No. 25, and to provide
disclosures  based on the fair  value  method in the  Notes to the  Consolidated
Financial Statements as permitted by Statement of Financial Accounting Standards
("SFAS")  No.  123,  as amended by SFAS No.  148,  "Accounting  for  Stock-Based
Compensation,   Transition  and   Disclosure".   Stock  or  other   equity-based
compensation  for  non-employees  is  accounted  for under the fair  value-based
method as required by SFAS No. 123 and Emerging  Issues Task Force  ("EITF") No.
96-18,  "Accounting  for  Equity  Instruments  That Are  Issued  to  Other  Than
Employees for Acquiring,  or in Conjunction with Selling, Goods or Services" and
other related interpretations. Under this method, the equity-based instrument is
valued at either  the fair  value of the  consideration  received  or the equity
instrument  issued  on the date of grant.  The  resulting  compensation  cost is
recognized and charged to operations  over the service period which, in the case
of stock options, is generally the vesting period. As we utilize stock and stock
options as one means of  compensating  employees,  consultants,  and  others,  a
change  in  accounting  for  stock-based   compensation   could,  under  certain
circumstances,   result  in  an  adverse  material  effect  on  our  results  of
operations, but would not affect cash flows.

RESULTS OF OPERATIONS

      2002 DERMATOLOGY COLLABORATION TERMINATION

      On September 1, 2002, DUSA and Schering AG, the Company's former marketing
and  development  partner  for  Levulan(R)  PDT in  the  field  of  dermatology,
terminated  the  parties'  Marketing  Development  and Supply  Agreement,  dated
November 22, 1999. As a result of this  termination,  DUSA reacquired all rights
it granted to Schering AG under the  agreement,  and evaluated  certain items on
its  Consolidated  Balance  Sheet for the  timing  of  revenue  recognition  and
potential impairment.  These items included unamortized deferred revenue related
to non-refundable  milestone  payments  previously  received under the agreement
with Schering AG, and assets including our manufacturing  facility, raw material
and finished goods inventories, commercial light units, and deferred charges and
royalties.  As a result of this  analysis,  in addition  to normal  amortization
recorded prior to the  termination  of the Schering AG agreement,  DUSA recorded
the  following  items  in  its  Consolidated  Statements  of  Operations  during
September 2002:


                                       49




                                                                                                             REVENUE
                                                                                                             RECOGNITION/
             STATEMENT OF OPERATIONS ITEM                          BALANCE SHEET ITEM                        ASSET IMPAIRMENT
        -------------------------------------------------     ------------------------------------------     ---------------------
                                                                                                       
           Revenues:
           ---------
           Research grant and milestone revenue                  Deferred revenue (1)                                 $20,990,000
                                                                                                             ---------------------

           Operating Costs:
           ----------------
           Cost of product sales                                 Deferred charges (2)                                    $543,000
                                                                 Inventory (3)                                          1,705,000
                                                                 Commercial  light  sources under lease
                                                                   or rental  (4)                                         390,000
                                                                                                             ---------------------
           Total cost of product sales                                                                                 $2,638,000

           Research and development costs                        Deferred royalty  (2)                                    639,000
                                                                                                             ---------------------
             Total operating cost charges                                                                              $3,277,000
                                                                                                             ---------------------


      1)    In  2002,  DUSA   accelerated  the  recognition  of  $20,990,000  of
            unamortized   research  grant  and  milestone  revenue,   which  was
            previously recorded as deferred revenue.

      2)    In 2002,  DUSA  charged (i)  $509,000  to cost of product  sales and
            royalties for deferred  charges  associated  with its amended Supply
            Agreement  with  Sochinaz  SA,  the  manufacturer  of the bulk  drug
            ingredient used in Levulan(R), (ii) $34,000 to cost of product sales
            and royalties for deferred charges associated with  underutilization
            costs  paid  to  National  Biological   Corporation   ("NBC"),   the
            manufacturer  of our  BLU-U(R),  and (iii)  $639,000 to research and
            development costs for deferred royalties associated with payments to
            PARTEQ,  the  Company's  licensor.  These  amounts  represented  the
            unamortized  balances of previously  deferred costs which were being
            amortized over periods ranging from 1 to 12 1/2 years.

      3)    In 2002,  DUSA  recorded  lower of cost or  market  adjustments  for
            estimated excess BLU-U(R) inventory of $1,594,000,  and $111,000 for
            bulk Levulan(R) based on (i) the termination of the Company's former
            dermatology  collaboration  arrangement,  (ii) limited product sales
            since the  September  2000 product  launch,  and (iii) the Company's
            expectations at that time of no significant  near-term  increases in
            Kerastick(R) sales levels and/or BLU-U(R) placements.

      4)    In 2002,  DUSA  recorded  an  additional  $390,000  of  depreciation
            expense  reflecting a shortened  useful life of our  BLU-U(R)  units
            under lease,  rental, or trial  arrangements to reflect a three-year
            asset life. This accelerated depreciation policy was attributable to
            the low level of BLU-U(R)  placements at the date of the termination
            of the collaboration  arrangement,  and management's expectations at
            that time that near-term placements would be limited.


                                       50



      YEAR ENDING DECEMBER 31, 2003 AS COMPARED TO 2002

      REVENUES  - Total  revenues  for the year  ended  December  31,  2003 were
$970,000,  as  compared  to  $25,483,000  in 2002.  Revenues  for 2002  included
research grant and milestone revenues of $22,312,000,  comprised of the one-time
recognition in September 2002 of unamortized up-front milestone and unrestricted
grant payments previously received from Schering AG totaling  $20,990,000 due to
the  termination of this  relationship,  and normal  amortization  of $1,322,000
earned   prior  to  the   termination.   See   section   entitled   "Results  of
Operations-2002 Dermatology Collaboration  Termination".  Revenues for 2002 also
included  $2,851,000 of research and development  reimbursement  which we earned
from our former marketing partner. Due to the termination of this agreement,  we
have not received any  co-development  revenue from  Schering AG  subsequent  to
2002.

      Total  product  sales and rental  income for the years ended  December 31,
2003 and 2002 were  $970,000 and  $319,000,  respectively,  and comprised of the
following:




                                                              YEAR ENDED DECEMBER 31,
                                                      -------------------------------------
                                                                                   INCREASE
                                                         2003         2002        (DECREASE)
                                                      ---------     ---------     ---------
                                                                         
     Kerastick(R)product sales                        $ 901,000     $ 209,000     $ 692,000
     BLU-U(R)product sales                               69,000            --        69,000
     BLU-U(R)rental and other sales                          --        33,000       (33,000)
     Royalty revenues (1)                                    --        77,000       (77,000)
                                                      ---------     ---------     ---------
            Total product sales and rental income     $ 970,000     $ 319,000     $ 651,000
                                                      =========     =========     =========




      (1)   Product sales for 2002 included royalty revenues of $77,000 which we
            previously earned for Kerastick(R)  sales by Berlex,  the subsidiary
            of our former marketing partner, to its distributor.


      The increase in 2003 Kerastick(R)  product sales revenue is due in part to
DUSA's receipt of 100% of revenues on units sold to end-users, primarily through
its  distributors,  as  compared to  approximately  30% of the net sales that we
received as a royalty  under our former  collaboration  agreement  during  2002.
Revenues  for  2003  also  included  BLU-U(R)  product  sales of  $69,000  after
receiving  FDA  clearance to market the BLU-U(R) as a stand alone device for the
treatment of moderate inflammatory acne vulgaris.

      As of December 31, 2003,  406 BLU-U(R)  units were in place in  physicians
offices,  up from 329 units at  December  31,  2002.  This  increase in BLU-U(R)
placements  included the sale of 21 units following  receipt of market clearance
from the FDA in September  2003 for acne.  Kerastick(R)  sales to end-users were
11,172  for  2003,  as  compared  to  7,116  for  2002.  Although  the  level of
Kerastick(R) sales to end-users for 2003 is higher than those in the prior year,
Kerastick(R)  sales  must  continue  to  increase  significantly  to offset  the
increased  costs  incurred for marketing and sales  activities.  See "Results of
Operations-Marketing and Sales Costs".


                                       51



      COST OF PRODUCT  SALES AND ROYALTIES - Cost of product sales and royalties
for the year ended December 31, 2003 were $3,481,000,  as compared to $5,253,000
in 2002.  The  components  of cost of product  sales and royalties for the years
ended December 31, 2003 and 2002, including direct and indirect costs to support
our product is provided below:




                                                                                           YEAR ENDED DECEMBER 31,
                                                                                 -------------------------------------------
                                                                                                                  INCREASE
                                                                                    2003            2002         (DECREASE)
                                                                                 -----------     -----------     -----------
                                                                                                        
COST OF PRODUCT SALES AND ROYALTIES

    Product costs including internal costs (e.g. customer service,  quality
       assurance, purchasing, depreciation,  amortization and other product
       support operations) assigned to support products (1)                      $ 2,297,000     $ 1,189,000     $ 1,108,000

    Direct Kerastick(R)product costs                                                 381,000          44,000         337,000

    Costs  incurred to ship,  install and service the BLU-U(R)in  physicians
       offices (2)                                                                   729,000         834,000        (105,000)

    Royalty and supply fees (3)                                                       74,000          64,000          10,000

    Net underutilization costs (4)                                                       -0-         333,000        (333,000)

    Deferred charges amortization (5)                                                    -0-         151,000        (151,000)

    Inventory and deferred charge adjustments  resulting from collaboration
       termination (6)                                                                   -0-       2,638,000      (2,638,000)
                                                                                 -----------     -----------     -----------

            Total cost of  product sales and royalties                           $ 3,481,000     $ 5,253,000     ($1,772,000)
                                                                                 ===========     ===========     ===========



      1)    The increase in product costs for 2003 is primarily  attributable to
            increased  costs to  support  the  preparation  to  manufacture  the
            Kerastick(R),  including the  submission of an NDA supplement to the
            FDA  for  our  manufacturing  facility,  facility  depreciation  and
            overhead allocations.

      2)    Although  there were direct  BLU-U(R) product sales  in 2003,  there
            were no related direct BLU-U(R) product costs in 2003 as these had a
            zero book value due to inventory  impairment charges recorded during
            2002  based  on  (i)  the   termination  of  the  Company's   former
            dermatology  collaboration  arrangement,  (ii) limited product sales
            since the  September  2000 product  launch,  and (iii) the Company's
            expectation  at that time of no significant  near-term  increases in
            Kerastick(R)sales levels and/or BLU-U(R) placements.

      3)    Royalty and supply fees are paid to our  licensor,  PARTEQ  Research
            and   Development   Innovations,   the   licensing  arm  of  Queen's
            University, Kingston, Ontario.

      4)    Underutilization costs commenced in 2001 and were fully amortized as
            of  December  31,  2002  based on  agreements  with our  third-party
            manufacturers  due  to  orders  falling  below  certain   previously
            anticipated levels.

      5)    Deferred charges amortization  reflects  consideration paid by us in
            2000  to  amend  our  Supply   Agreement   with   Sochinaz  SA,  the
            manufacturer of the bulk drug  ingredient  used in Levulan(R).  Such
            deferred charges were fully amortized in 2002.

      6)    See  section  entitled  "Results  of   Operations-2002   Dermatology
            Collaboration Termination".

      RESEARCH AND DEVELOPMENT  COSTS - Research and  development  costs for the
year ended  December 31, 2003 were  $5,404,000  as compared to  $12,122,000  for
2002.  The  overall  lower level of research  and  development  costs in 2003 is
attributable,  in part, to the absence of  co-sponsored  project costs that were
agreed to under the  collaboration  termination in 2002, of which  approximately
two-thirds,  or  $2,851,000,  were  previously  reimbursed  to us by our  former
marketing  partner.  Co-sponsored  projects  included  Phase I/II studies  using
Levulan(R)  PDT in the treatment of persistent  plantar warts and  onychomycosis
(nail  fungus).  These  projects  have  been  put on hold as we  concentrate  on
increasing sales, and implementing a new dermatology development program focused
on indications that use our approved Kerastick(R). Based on market research that
was completed  earlier in 2003, we decided to move forward with Phase II studies
for use of Levulan(R) PDT in  photodamaged  skin and acne rather than pursuing a
broad  area  actinic  keratoses  treatment,  as we do  not  believe  the  former
indication would have a major impact on sales.


                                       52



      In 2003,  we also  received  market  clearance  from the FDA on a  Section
510(k)  premarket  notification  application  for  use of the  BLU-U(R)  without
Levulan(R) to treat moderate  inflammatory acne. This year's development program
included the completion of an FDA-mandated Phase IV long-term AK tracking study,
which was completed at the end of 2003,  with the final report  submitted to the
FDA in January 2004. DUSA is also funding various investigator studies involving
ALA and/or the Kerastick(R).

      The  decrease  in  research  and   development   costs  in  2003  is  also
attributable  to the  assignment of personnel and related costs to marketing and
sales  functions  as of  January  1, 2003 that were  previously  functioning  in
research and development  roles,  which totaled $1,310,000 in 2002. In addition,
costs incurred in 2002 included the write-off of $639,000 of previously deferred
royalties  associated  with  payments to PARTEQ,  our  licensor,  and a $500,000
milestone  payment under our license  agreement  signed in December 2002 between
DUSA  and  Photonamic  GmbH & Co.  KG, a  subsidiary  of  medac  GmbH,  a German
pharmaceutical  company.  In  addition,  we may also be obligated to pay certain
regulatory  milestones  of  $1,250,000  upon FDA  acceptance  of a  registration
application  for a brain cancer product in the United States,  and an additional
$1,250,000 upon  registration of the product and royalties of 12.5% on net sales
under the terms of the License and  Development  Agreement.  This agreement also
grants a license of Photonamic's  proprietary  technology  related to ALA in the
field of brain cancer.

      Research and development  costs for 2002 also included higher  third-party
expenditures  in  support of our FDA  mandated  Phase IV  clinical  study of the
long-term  efficacy of our marketed  product,  clinical  feasibility  studies in
other  dermatological  indications,  and our Phase I/II clinical  studies on the
safety and efficacy of Levulan(R) PDT treatment of Barrett's  esophagus with and
without dysplasia.

      We have also been  conducting  Phase  I/II  studies  in the  treatment  of
high-grade and low-grade dysplasia associated with Barrett's esophagus.  Results
of the high-grade  dysplasia  (HGD) study as of January 2003, with twelve months
of follow-up  data in four  patients,  and six months in one  patient,  showed a
continued complete ablation of HGD. The treatment has been well tolerated,  with
no occurrence of strictures  (circumferential scarring), and no signs of mucosal
overgrowth.  In addition,  in preparation  for a Phase II clinical trial, we are
planning to carry out a small  single-center pilot Phase II clinical trial using
DUSA's new  proprietary  endoscopic  light delivery  device for the treatment of
HGD. However,  currently,  we do not plan to fund other Phase II or III clinical
trials for this  indication  on our own.  Therefore,  we are seeking a strategic
partner to join in the development, marketing, and distribution of our treatment
for Barrett's esophagus dysplasia.  While our original goal had been to complete
a partnership  agreement  during 2003, we did not have a partnership in place at
the end of 2003.  There can be no assurance  that we will be able to  consummate
any collaboration on terms acceptable to us.


                                       53



      We expect  research  and  development  costs to increase to  approximately
$6,500,000  to $7,500,000  during 2004 due  primarily to initiating  our planned
Phase II clinical studies  relating to photodamaged  skin and moderate to severe
acne.  Final cost  estimates  on these Phase II studies are in process as we are
working with the FDA to determine the necessary protocols.

      MARKETING  AND  SALES  COSTS -  Marketing  and  sales  costs for 2003 were
$2,494,000, comprised of $924,000 in payroll related costs, including direct and
indirect commissions,  with the remaining balance in support of such efforts. In
the prior year, there were no marketing and sales expenses  incurred directly by
us as all rights  and  activities  associated  with  marketing  and sales of our
products  were the sole  responsibility  of our  former  partner.  In late 2002,
following  the  termination  of our  collaboration  with  our  former  marketing
partner, we commenced marketing  initiatives  associated with having full rights
and  responsibilities for our products.  In addition,  as of January 1, 2003, we
reassigned  resources that were functioning in research and development roles to
our marketing and sales  function.  In August 2003, DUSA hired an Associate Vice
President  of Sales,  and in  October  2003 we hired,  trained,  and  deployed a
regional   sales   force,   which  was   initially   comprised   of  six  direct
representatives,  various independent representatives,  and an independent sales
distributor,  to  focus  on most of our key  geographic  markets  in the  United
States. At the end of December 2003, we hired our seventh direct  representative
in a key target  market,  and in January  2004, we continued to expand our sales
capacity  by  adding  one  more  direct   representative   and  an   independent
representative  in another key target  market.  We anticipate  that the level of
marketing  and sales  expenses and related  support  functions  will continue to
increase  in 2004 as we seek to  expand  our sales  capacity  as a result of the
initial success of our sales initiatives.

      GENERAL AND ADMINISTRATIVE COSTS - General and administrative expenses for
the year ended  December  31,  2003  increased  to  $6,344,000  as  compared  to
$5,591,000  for 2002.  This  increase  is mainly  attributable  to higher  legal
expenses  incurred in 2003 of $3,253,000 as compared to $1,970,000 in 2002,  due
primarily to patent  defense  costs.  It is expected  that legal  expenses  will
remain  at  elevated  levels  as long as the  patent  dispute  continues.  These
increased legal expenses were offset,  in part, by lower staffing  related costs
of approximately  $458,000 in 2003, due primarily to employee separations during
2002.

      In April 2002,  we received a copy of a notice  issued by PhotoCure ASA to
Queen's  University at Kingston,  Ontario,  alleging that Australian  Patent No.
624985,  which is one of the patents  licensed by PARTEQ to us,  relating to ALA
technology,  is invalid. As a consequence of this action, Queen's University has
assigned the Australian patent to us so that we may participate directly in this
litigation.  We have filed an answer  setting  forth our  defenses and a related
countersuit  alleging  that certain  activities  of PhotoCure  and its marketing
partner,  Galderma  S.A,  infringe  the  patent.  The case is ongoing and we are
unable to predict the outcome at this time. DUSA believes that the final hearing
in the Federal Court of Australia will occur in April 2004.


                                       54



      In December  2003,  the  Company was served with a complaint  filed in the
State of Michigan  Circuit Court for the County of Oakland  alleging that DUSA's
BLU-U(R)  caused the plaintiff to suffer a seizure during the performance of her
duties as an office assistant. The complaint names Berlex Laboratories,  Inc., a
subsidiary of our former marketing partner,  as another  defendant.  The damages
are unspecified.  The case has been removed to the U.S. District Court,  Eastern
District of Michigan,  Southern Division. While it is not possible to predict or
determine  the  outcome of this  action,  the  Company  believes  that the costs
associated with all such matters will not have a material  adverse effect on its
consolidated  financial  position or liquidity but could possibly be material to
the consolidated results of operations in any one period to the extent costs are
not covered by DUSA's insurance.

      OTHER  INCOME,  NET - Other  income for the year ended  December  31, 2003
decreased  to  $1,926,000,  as compared to  $3,245,000  in 2002.  This  decrease
reflects lower levels of investable cash balances as we used cash to support our
operating activities, and a decline in yields. With the addition of the proceeds
from the  private  placement  in March  2004,  interest  income  will  initially
increase and then may decline,  dependent on interest  rates,  as our investable
cash balances are used to support our operating activities.  In addition,  other
income in 2002  included  $500,000  of gains on the sale of  securities  to meet
planned cash operating  requirements.  There were no such sales of securities in
2003. During 2003 and 2002, we incurred interest expense of $56,000 and $47,000,
respectively,  on  borrowings  associated  with  the  construction  of  our  new
Kerastick(R)  manufacturing facility. Of these amounts,  $36,000 and $47,000 has
been currently capitalized in property and equipment in the Consolidated Balance
Sheet in 2003 and 2002, respectively.

      INCOME  TAXES - There is no  provision  for  income  taxes due to  ongoing
operating   losses.  As  of  December  31,  2003,  we  had  net  operating  loss
carryforwards  of  approximately  $59,531,000  and tax credit  carryforwards  of
approximately $1,791,000 for Federal reporting purposes. These amounts expire at
various  times  through  2023.  See  Note 11 to the  Notes  to the  Consolidated
Financial  Statements.  In addition,  although we had net income for 2002, there
was no income tax expense  because the majority of the revenue we  recognized in
connection with the termination of the Schering AG agreement had been taxable in
prior years for income tax purposes.  The Company has provided a full  valuation
allowance against the net deferred tax assets at December 31, 2003 and 2002.

      NET INCOME (LOSS) - For the year ended  December 31, 2003, we recognized a
net loss of  ($14,827,000),  or ($1.06) per share,  as compared to net income of
$5,763,000,  or $0.42 per  share,  for the year ended  2002.  As a result of the
termination of our former dermatology collaboration arrangement,  net income for
2002 included a one-time increase of approximately $17,713,000, excluding normal
amortization  recorded  prior  to  termination,  based  on the  acceleration  of
previously  deferred  revenue  and  costs,  and other  related  adjustments  for
impairment.  See  section  entitled  "Results  of  Operations-2002   Dermatology
Collaboration Termination". This one-time recognition resulted in an increase to
earnings per share of $1.28 for the 2002  period.  Net losses are expected to be
incurred until the successful  market  penetration of our products occurs.  Such
losses  are  expected  to  continue  until  end-user  sales  offset  the cost of
launching our sales force, marketing  initiatives,  and costs for other business
support functions.


                                       55



      YEAR ENDING DECEMBER 31, 2002 AS COMPARED TO 2001

      REVENUES  - Total  revenues  for the year  ended  December  31,  2002 were
$25,483,000,  as compared to  $5,391,000 in 2001.  Research  grant and milestone
revenues  were  $22,312,000  in 2002,  as compared to  $1,983,000  in 2001,  and
included the one-time  recognition in 2002 of unamortized up-front milestone and
unrestricted  grant  payments  previously  received  from  Schering  AG totaling
$20,990,000 due to the  termination of this  relationship in September 2002, and
normal  amortization of $1,322,000  received prior to the termination.  In 2001,
research grant and milestone revenue included normal amortization of $1,983,000.
See section  entitled  "Results  of  Operations-2002  Dermatology  Collaboration
Termination". In addition, revenues for 2002 included $2,851,000 of research and
development  reimbursement which we earned from our former marketing partner, as
compared to $2,893,000 in 2001.

      Revenues  for 2002  also  included  product  sales  and  rental  income of
$319,000,  as  compared  to $515,000 in 2001.  This  decrease  reflected  direct
Kerastick(R)  sales of  $209,000  in 2002  from our  distributor  to  physicians
subsequent to reacquiring  our product rights in September  2002, as compared to
$358,000 in 2001 for direct  Kerastick(R)  sales to Berlex,  a subsidiary of our
former marketing  partner.  During 2002, we had no direct  Kerastick(R) sales to
Berlex as the  distribution  channel to physicians was filled in late 2001. Also
included  in 2002  product  sales and rental  income  were  royalty  revenues of
$77,000  which we  previously  earned  for  Kerastick(R)  sales by Berlex to its
distributor, and BLU-U(R) rental and other product sales of $33,000, as compared
to royalty  revenues of $55,000,  and BLU-U(R) rental and other product sales of
$102,000 in 2001.

      As of December 31, 2002,  excluding  BLU-U(R) units  installed at clinical
trial sites or sold to our former partner,  329 BLU-U(R) units were in place, up
from the 282 units at December  31, 2001.  Kerastick(R)  units sold to end-users
were 7,116 in 2002 as compared to 7,071 in 2001.

      COST OF PRODUCT  SALES AND ROYALTIES - Cost of product sales and royalties
for the year ended December 31, 2002 were $5,253,000,  as compared to $2,149,000
in 2001. This increase was mainly  attributable to the recognition of $2,638,000
for lower of cost or market inventory adjustments,  increased depreciation taken
on BLU-U(R)  units,  and deferred  charges  associated  with our amended  Supply
Agreement  with  Sochinaz  SA.  The  components  of cost of  product  sales  and
royalties for the years ended December 31, 2002 and 2001,  including  direct and
indirect costs for supporting our product is provided below:


                                       56




                                                                                              YEAR ENDED DECEMBER 31,
                                                                                  ------------------------------------------------
                                                                                                                         INCREASE
                                                                                     2002               2001            (DECREASE)
                                                                                  ----------         ----------         ----------
                                                                                                               
COST OF PRODUCT SALES AND ROYALTIES

    Recognition for lower of cost or market inventory adjustments,  increased
       depreciation taken on BLU-U(R) units, and deferred charges as a result of
       the termination of our collaboration agreement with
       Schering AG                                                                $2,638,000         $      -0-         $2,638,000

    Internal manufacturing costs (e.g. customer service, quality
       assurance, purchasing, and other product support operations)
       assigned to products                                                        1,189,000            691,000            498,000

    Costs incurred to ship, install and service the BLU-U(R)in  physicians
       offices including depreciation                                                834,000            266,000            568,000

    Royalty and supply fees (1)                                                       64,000             63,000              1,000

    Net underutilization costs (2)                                                   333,000            534,000           (201,000)

    Amortization of deferred charges (3)                                             151,000            226,000            (75,000)

    Direct Kerastick(R)product costs including related testing                        44,000            369,000           (325,000)
                                                                                  ----------         ----------         ----------
            Total cost of  product sales and royalties                            $5,253,000         $2,149,000         $3,104,000
                                                                                  ==========         ==========         ===========



      1)    Royalty and supply fees are paid to our  licensor,  PARTEQ  Research
            and   Development   Innovations,   the   licensing  arm  of  Queen's
            University, Kingston, Ontario.

      2)    Underutilization costs commenced in 2001 and were fully amortized as
            of  December  31,  2002  based on  agreements  with our  third-party
            manufacturers  due  to  orders  falling  below  certain   previously
            anticipated levels.

      3)    Deferred charges amortization  reflects  consideration paid by us in
            2000  to  amend  our  Supply   Agreement   with   Sochinaz  SA,  the
            manufacturer of the bulk drug  ingredient  used in Levulan(R).  Such
            deferred charges were fully amortized in 2002.


      RESEARCH AND DEVELOPMENT  COSTS - Research and  development  costs for the
year ended December 31, 2002 were  $12,122,000  as compared to  $10,790,000  for
2001.  This increase in research and  development  costs is  attributable to the
write-off of $639,000 of previously deferred royalties  associated with payments
to PARTEQ,  our  licensor,  and a $500,000  milestone  payment under our license
agreement  signed in December 2002 between DUSA and Photonamic  GmbH & Co. KG, a
subsidiary  of  medac  GmbH,  a  German  pharmaceutical  company.  Research  and
development  costs for 2002 also included  higher  third-party  expenditures  in
support of our FDA mandated Phase IV clinical study of the long-term efficacy of
our  marketed  product,  clinical  feasibility  studies in other  dermatological
indications,  and our Phase I/II clinical  studies on the safety and efficacy of
Levulan(R) PDT treatment of Barrett's  esophagus with and without dysplasia.  In
addition,  under our former agreement with Schering AG, $2,851,000 of the agreed
upon  dermatology  research and  development  expenses were  reimbursed to us by
Schering AG for 2002 as compared to $2,893,000 for 2001.


                                       57



      GENERAL AND ADMINISTRATIVE COSTS - General and administrative expenses for
the year ended  December  31,  2002  increased  to  $5,591,000  as  compared  to
$3,655,000  for 2001.  This  increase  is mainly  attributable  to higher  legal
expenses  incurred in 2002 of  $1,970,000  as compared to $490,000 in 2001,  due
primarily to patent defense  costs,  the  termination of our former  dermatology
collaboration arrangement,  and strategic initiatives. We also incurred employee
separation costs of  approximately  $395,000 during 2002. There were no employee
separation costs in 2001.

      OTHER  INCOME,  NET - Other  income for the year ended  December  31, 2002
decreased to  $3,245,000,  as compared to $3,845,000 in 2001.  This decrease was
attributable  to lower  interest  income of  $2,745,000  in 2002 as  compared to
$3,753,000 in 2001  reflecting a decrease in investable cash balances as we used
cash to support our operating activities, and lower yields. Gains on the sale of
securities of $500,000 in 2002 in order to meet cash operating requirements,  as
compared  to $92,000 in 2001,  partly  offset this  decline in interest  income.
During 2002, we incurred  interest  expense of $47,000 on borrowings  associated
with the construction of our new Kerastick(R)  manufacturing facility, which was
capitalized  in property and equipment in the  Consolidated  Balance Sheet as of
December 31, 2002.

      INCOME  TAXES - Although  we had net income for 2002,  there was no income
tax expense.  The majority of the revenue we recognized  in connection  with the
termination  of the  Schering AG  agreement  had been taxable in prior years for
income tax purposes.

      NET INCOME  (LOSS) - For the year ended  December 31, 2002,  we earned net
income  of  $5,763,000,  or  $0.42  per  share,  as  compared  to a net  loss of
($7,358,000),  or ($0.53) per share, for the year ended 2001. As a result of the
termination of our former dermatology collaboration arrangement,  net income for
2002 included a one-time increase of approximately $17,713,000, excluding normal
amortization  recorded  prior  to  termination,  based  on the  acceleration  of
previously  deferred  revenue  and  costs,  and other  related  adjustments  for
impairment.  See  section  entitled  "Results  of  Operations-2002   Dermatology
Collaboration Termination".


                                       58



QUARTERLY RESULTS OF OPERATIONS

      The following is a summary of the quarterly  results of operations for the
years ended December 31, 2003 and 2002, respectively:




                                                          QUARTERLY RESULTS FOR YEAR ENDED DECEMBER 31, 2003
                                                -------------------------------------------------------------------
                                                  MARCH 31           JUNE 30          SEPTEMBER 30      DECEMBER 31
                                                -----------        -----------        ------------      -----------
                                                                                            
     Total revenues                             $   143,370        $   147,275        $   163,155        $   516,309
     Loss from operations                        (4,132,108)        (4,338,080)        (4,088,789)        (4,194,208)
     Net loss                                    (3,565,973)        (3,811,116)        (3,679,858)        (3,769,907)
     Basic and diluted loss per share                 (0.26)             (0.27)             (0.26)             (0.27)





                                                         QUARTERLY RESULTS FOR YEAR ENDED DECEMBER 31, 2002
                                               -------------------------------------------------------------------
                                                 MARCH 31           JUNE 30          SEPTEMBER 30      DECEMBER 31
                                               -----------        -----------        ------------      -----------
                                                                                           
     Total revenues                            $ 1,325,498        $ 1,429,978        $22,565,754       $   162,008
     Income (loss) from operations              (3,641,970)        (4,222,468)        15,065,172        (4,683,565)
     Net income (loss)                          (2,867,551)        (3,437,566)        15,760,873        (3,693,238)
     Basic and diluted income (loss) per
         share                                       (0.21)             (0.25)              1.13             (0.27)



LIQUIDITY AND CAPITAL RESOURCES

      We are in a strong cash  position to continue to increase  Levulan(R)  PDT
marketing  expenses and to fund our current research and development  activities
for our Levulan(R) PDT/PD platform.  Our primary sources of working capital have
been public and private  equity  financings,  as well as research  milestone and
grant payments from our former  marketing and development  partner.  At December
31,  2003,  we had  approximately  $37,969,000  of cash  resources  comprised of
$4,294,000 of cash and cash equivalents,  United States government securities of
$33,536,000,  and  restricted  cash  of  $139,000.  All  of  our  United  States
government  securities  are classified as available for sale. As of December 31,
2003, these securities had yields ranging from 3.65% to 7.36% and maturity dates
ranging from January 15, 2004 to September 24, 2007.

      On February  27,  2004,  DUSA  completed a private  placement of 2,250,000
shares of our common stock at a purchase price of $11.00 per share  resulting in
gross  proceeds of  $24,750,000.  DUSA also granted the  investors  the right to
purchase up to an aggregate of an additional  337,500  shares of common stock at
$11.00 per share. These additional investment rights expire 30 trading days from
closing, which occurred on March 2, 2004.

      As of December 31, 2003,  our working  capital (total current assets minus
total current  liabilities)  was  $33,838,000  as compared to  $48,891,000 as of
December  31, 2002.  Total  current  assets  decreased  $15,210,000  in 2003 due
primarily to a decline in cash, cash  equivalents,  and United States government
securities of  $14,846,000  as we use cash to support our operating  activities.
Total current liabilities  decreased $157,000 in 2003 due primarily to a decline
in other  accrued  expenses of $908,000 as higher 2002 accruals for research and
development  costs,  product  related costs and license  milestone  were paid in
2003, offset, in part, by an increase in accounts payable,  accrued payroll, and
deferred  revenue on  Kerastick(R)  units due to growth in operations and sales,
including an increase in personnel.


                                       59



      During  2003,  we used  $12,762,000  of  cash  for  operating  activities,
incurred  property,  plant,  and equipment  additions of $633,000,  and received
$11,000,000  of net  proceeds  from  maturations  of  United  States  government
securities.  During 2003, we also made  payments on long-term  debt of $270,000,
while  receiving  $33,000 in proceeds  from stock option  exercises.  During the
comparable 2002 period,  we used  $11,786,000 of cash for operating  activities,
purchased  $2,622,000 of property and equipment  primarily  attributable  to the
construction  of our  manufacturing  facility,  and  received  net  proceeds  of
$12,115,000  from   maturations  and  purchases  of  United  States   government
securities.   During  2004,   we  expect  to  incur  capital   expenditures   of
approximately  $700,000,  which  includes  upgrades to our computer  systems and
website,  and  marketing  fixtures,  as well as other  purchases  to support the
growth in our business.

      In May  2002,  we also  received  $1,900,000  under a  secured  term  loan
promissory  note  ("Note")  with  Citizens  Bank of  Massachusetts  to fund  the
construction  of our  manufacturing  facility  and made  payments on the Note of
$113,000  during  2002.  As of December  31, 2003,  the total  outstanding  loan
balance was $1,518,000,  of which $270,000 is current.  Approximately $3,000,000
of the Company's United States  government  securities are pledged as collateral
to secure the loan. Prior to expiration of the 360-day LIBOR-based rate for each
year of the loan, we can either  continue to choose a  LIBOR-based  rate at that
time,  execute a one-time  conversion  to a fixed  rate loan,  or repay the loan
balance.  The current  interest  rate on the Note is 2.755%  based on the annual
renewal on June 30, 2003. As this rate was lower than the yield being  generated
by each of our United States government  securities at that time, we decided not
to repay the loan.

      We believe that we have sufficient  capital  resources to proceed with our
current  programs  for  Levulan(R)  PDT,  and to  fund  operations  and  capital
expenditures  for the foreseeable  future.  We have invested our funds in liquid
investments, so that we have ready access to these cash reserves, as needed, for
the funding of development plans on a short-term and long-term basis.

      As a result of the  termination  of our former  dermatology  collaboration
arrangement,  we evaluated our operations during 2003 and minimized research and
development  and  related  general  and  administrative  expenditures  while  we
concentrated on implementing  new sales,  marketing,  physician  education,  and
development strategies. Such strategies included the hiring of an Associate Vice
President of Sales in August 2003  followed by the October 2003 launch of DUSA's
initial sales force, and  participation in various medical  education events. We
anticipate  that the level of marketing and sales  expenses and related  support
functions  will  increase  in 2004 as we seek to expand our sales  capacity as a
result of the  initial  success  of our sales  initiatives.  We may also seek to
expand or enhance  our  business  by using  resources  to  acquire  by  license,
purchase or other  arrangements,  businesses,  new  technologies,  or  products,
especially  in  PDT-related  areas.  For  2004,  we are  focusing  primarily  on
increasing the sales of the Levulan(R) Kerastick(R) and the BLU-U(R), initiating
Phase II studies for use of Levulan(R) PDT in  photodamaged  skin and acne using
our Kerastick(R), and on seeking a partner to help develop and market Levulan(R)
PDT for the treatment of dysplasia in patients with  Barrett's  esophagus.  Full
development and testing of all potential  indications  would require  additional
funding.  The timing of  expenditures  will be  dependent  on  various  factors,
including:


                                       60



      o     the level of sales of our  products  including  the  success  of our
            marketing   programs   since   reacquiring   the   rights   to   the
            dermatological uses of Levulan(R)PDT,

      o     progress of our research and development programs,

      o     the results of preclinical and clinical trials,

      o     the timing of regulatory marketing approvals,

      o     competitive developments,

      o     the results of patent disputes,

      o     any new additional collaborative arrangements, if any, we may enter,
            and

      o     the availability of other financing.

      We cannot  accurately  predict  the level of  revenues  from  sales of our
products.  In order to maintain and  continue to expand our sales and  marketing
endeavors, and to initiate our planned research and development programs, we may
need to raise additional funds through future corporate  alliances,  financings,
or other sources, depending upon the amount of sales we receive.

      The total capital costs used to develop our manufacturing facility,  which
was approved to manufacture the Levulan(R) Kerastick(R) by the FDA in July 2003,
was approximately $2,665,000, including equipment. We have also incurred certain
environmental  control costs as part of our development of a production line for
Kerastick(R)   manufacturing   to  ensure  that  our  facility   complies   with
environmental standards.  However, there can be no assurance that we will not be
required to incur significant additional costs to comply with environmental laws
and regulations in the future, or any assurance that our operations, business or
assets  will  not  be  materially   adversely  affected  by  current  or  future
environmental  laws or regulations.  See section entitled "Business - Government
Regulation".

      DUSA has no off-sheet balance sheet financing  arrangements other than its
operating leases.



                                       61



CONTRACTUAL OBLIGATIONS AND OTHER COMMERCIAL COMMITMENTS

      Our  contractual  obligations  and other  commercial  commitments  to make
future  payments  under  contracts,  including  lease  agreements,  research and
development contracts, manufacturing contracts, or other related agreements, are
as follows at December 31, 2003:




                                                                   OBLIGATIONS DUE BY PERIOD
                                             ----------------------------------------------------------------------
                                                            1 YEAR OR                                     AFTER 5
                                               TOTAL           LESS        2-3 YEARS       4-5 YEARS        YEARS
                                             ----------     ----------     ----------     ----------     ----------
                                                                                          
Operating lease obligations                  $3,712,000     $  417,000     $  865,000     $  828,000     $1,602,000
Research and development projects (1, 2)     $1,822,000     $1,822,000             --             --             --
Secured term loan promissory note            $1,517,500     $  270,000     $  540,000     $  540,000     $  167,500



      1)    Research  and  development   projects  include  various  commitments
            including  initial  obligations  for our  planned  Phase II clinical
            studies for  photodamaged  skin and moderate to severe  acne.  Final
            cost  estimates  on these  Phase II studies are in process as we are
            working with the FDA to determine the necessary protocols.

      2)    In addition to the obligations  disclosed  above, we have contracted
            with Therapeutics, Inc., a clinical research organization, to manage
            the   clinical   development   of  our  products  in  the  field  of
            dermatology.  This  organization  has the opportunity for additional
            stock  grants,  bonuses,  and  other  incentives  for  each  product
            indication  ranging from  $250,000 to  $1,250,000,  depending on the
            regulatory  phase of  development  of products  under  Therapeutics'
            management.

RECENTLY ISSUED ACCOUNTING GUIDANCE

      In January 2003, the FASB issued  Interpretation No. 46, "Consolidation of
Variable Interest  Entities,  an interpretation of ARB No. 51" ("FIN 46"), which
was  amended  by FIN  46R  issued  in  December  2003.  This  interpretation  of
Accounting  Research  Bulletin  No.  51,  "Consolidated  Financial  Statements,"
addresses  consolidation by business  enterprises of variable  interest entities
(VIEs) that either:  (1) do not have  sufficient  equity  investment  at risk to
permit the entity to finance  its  activities  without  additional  subordinated
financial  support,  or (2) for which the  equity  investors  lack an  essential
characteristic of a controlling financial interest.  This Interpretation applies
immediately to VIEs created after January 31, 2003. It also applies in the first
fiscal year or interim  period  ending  after March 15,  2004,  to VIEs  created
before February 1, 2003 in which an enterprise holds a variable interest. FIN 46
requires  disclosure  of VIEs in financial  statements  issued after January 31,
2003,  if it is  reasonably  possible that as of the  transition  date:  (1) the
company  will be the primary  beneficiary  of an existing  VIE that will require
consolidation or, (2) the company will hold a significant  variable interest in,
or have  significant  involvement  with,  an existing VIE. DUSA has adopted this
statement  which  had  no  effect  on  our  financial  position  or  results  of
operations.

INFLATION

      Although  inflation  rates have been  comparatively  low in recent  years,
inflation is expected to apply upward  pressure on our operating  costs. We have
included an inflation  factor in our cost  estimates.  However,  the overall net
effect of inflation on our operations is expected to be minimal.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

      We hold fixed income United States government  securities that are subject
to  interest  rate market  risks.  However,  we do not believe  that the risk is
material as we make our investments in relatively short-term  instruments and we
strive to match the maturity dates of these  instruments to our cash flow needs.
A 10% decline in the average yield of these  instruments  would reduce  interest
income by approximately  $189,000 based on our December 31, 2003 balance in U.S.
government securities.


                                       62



      We currently have exposure to interest rate risk under a secured term loan
promissory note which we issued to fund the  construction  of our  manufacturing
facility.  Interest  on this  loan is at a  LIBOR-based  rate,  and calls for an
annual  renewal on June 30th of each year  through  June 30,  2009 to either the
applicable  LIBOR-based rate or a one-time  conversion to a fixed rate loan. The
current loan rate of 2.755% is based on a LIBOR-based rate plus 175 basis points
at the time of renewal  (LIBOR is 1.46% at December 31,  2003).  Our exposure to
interest rate risk due to changes in LIBOR is not expected to be material.

FORWARD-LOOKING STATEMENTS SAFE HARBOR

      This report, including the Management's Discussion and Analysis,  contains
various  "forward-looking  statements"  within the meaning of Section 27A of the
Securities Act of 1933 which represent our  expectations  or beliefs  concerning
future  events,  including,  but not limited to  statements  regarding  our core
objectives  for  2004,  management's  beliefs  regarding  the  unique  nature of
Levulan(R) and its use and potential use,  expectations  regarding the timing of
results  of  clinical  trials and future  development  of warts,  onychomycosis,
psoriasis,   molluscum   contagioscum,   oily  skin  and  acne  rosacea,  facial
photodamaged  skin,  acne,  Barrett's  esophagus  dysplasia and other  potential
indications,   intention  to  pursue   licensing,   marketing,   copromotion  or
acquisition opportunities, status of clinical programs for all other indications
and beliefs regarding potential efficacy and marketing, our intention to develop
combination  drug  and  light  device  systems,  our  intention  to  test  a new
proprietary  endoscopic light delivery system, our intention to expand our sales
force,  hope that our  products  will be an AK therapy of choice and barriers to
achieving that status,  beliefs  regarding  revenues from approved and potential
products  and  Levulan's(R)  competitive  properties,  intention  to postpone or
commence  clinical  trials and  investigator  studies in 2004,  expectations  of
exclusivity under the Hatch-Waxman Act and other patent laws, intentions to seek
additional United States and foreign regulatory  approvals,  trademarks,  and to
market outside the United States,  beliefs regarding  environmental  compliance,
beliefs  concerning  patent disputes,  the impact of a third-party's  regulatory
compliance and fulfillment of contractual obligations,  plans to monitor cost of
product sales,  expectations of increases in cost of product sales, expected use
of cash  resources  in  2004,  requirements  of cash  resources  for our  future
liquidity,  anticipation of hiring additional personnel, effect of reimbursement
policies  on  revenues,  expectations  for future  strategic  opportunities  and
research and development programs, expectations for continuing operating losses,
expectations  regarding  the  adequacy and  availability  of  insurance,  stable
administrative  costs,  status of  research  and  development  costs,  levels of
interest income and our capital resource needs,  intention to sell securities to
meet capital requirements,  our manufacturing  facilities and its related costs,
and potential  for  additional  inspection  and testing,  beliefs  regarding the
adequacy of our inventory of Kerastick(R)  units, belief regarding interest rate
risks to our investments and effects of inflation and new accounting  standards,
dependence on key personnel,  beliefs  concerning  product liability  insurance,
intention  to  continue to develop  integrated  drug and light  device  systems,
belief that our new facility will help control  costs and our principal  methods
of  competition.  These  forward-looking  statements  are further  qualified  by
important  factors that could cause  actual  results to differ  materially  from
those  in  the  forward-looking  statements.   These  factors  include,  without
limitation,  changing market and regulatory conditions,  actual clinical results
of our trials, the reimbursement by third-parties for our treatments, the impact
of competitive  products and pricing,  the timely  development,  FDA and foreign
regulatory approval, and market acceptance of our products,  environmental risks
relating  to  our  products   reliance  on  third-parties  for  the  production,
manufacture,  sales and marketing of our  products,  the  securities  regulatory
process,  the  maintenance  of  our  patent  portfolio  and  ability  to  obtain
competitive levels of reimbursement by third-party  payors, none of which can be
assured.  Results actually  achieved may differ materially from expected results
included in these statements as a result of these or other factors.



                                       63


ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Independent Auditors' Report..............................................   F-1

Consolidated Balance Sheets...............................................   F-2

Consolidated Statements of Operations.....................................   F-3

Consolidated Statements of Shareholders' Equity...........................   F-4

Consolidated Statements of Cash Flows.....................................   F-5

Notes to the Consolidated Financial Statements............................   F-6


ITEM  9.  CHANGES  IN AND  DISAGREEMENTS  WITH  ACCOUNTANTS  ON  ACCOUNTING  AND
          FINANCIAL DISCLOSURE

      None.

ITEM 9A. CONTROLS AND PROCEDURES

      We carried out an evaluation,  under the direction of our Chief  Executive
Officer and Chief  Financial  Officer,  of the  effectiveness  of the design and
operation of our disclosure  controls and procedures (as defined in Exchange Act
Rules 13a-15(e) and 15d-15(e)).  Based upon that evaluation, the Chief Executive
Officer and Chief Financial Officer  concluded that our disclosure  controls and
procedures were effective as of December 31, 2003. There have been no changes in
our internal  control over financial  reporting that occurred during the quarter
ended December 31, 2003 that have materially affected,  or are reasonably likely
to materially affect, DUSA's internal control over financial reporting.



                                       64



                                    PART III

ITEM  10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

BOARD OF DIRECTORS

      The name,  age and current  position  with the Company of each director is
listed  below,   followed  by  summaries  of  their  backgrounds  and  principal
occupations.




NAME                                       AGE     POSITION                                               DATE ELECTED
----                                       ---     --------                                               ------------
                                                                                                 
                                                   President, Chief Executive Officer,
D. Geoffrey Shulman, MD, FRCPC.........     49     and Director (principal executive officer).......         9/05/91

John H. Abeles, MD (1) (3).............     59     Director.........................................         8/02/94

David M. Bartash(1)(2).................     61     Director.........................................        11/16/01

                                                   Chairman of the Board
Jay M. Haft, Esq(1)(2)(3)..............     68     and Director.....................................         9/16/96

Richard C. Lufkin (1) (3)..............     57     Director.........................................         1/27/92

Magnus Moliteus (2)....................     65     Director.........................................         7/25/03


      (1)   Member of the Audit Committee.

      (2)   Member of the Compensation Committee.

      (3)   Member of the Nominating and Corporate Governance Committee.

      D. Geoffrey Shulman,  MD, FRCPC, is the Company's  founder,  President and
CEO and formerly served as our Chairman.  Dr. Shulman, a dermatologist,  was the
President and a director of Draxis Health Inc. from its founding in October 1987
until May 1990, was Co-Chairman from October 1990 to April 1993, and Chairman of
the Board from April 1993 until March 1996. Dr. Shulman also participates,  on a
limited basis, in a private dermatology practice.

      John H. Abeles,  MD, is the President and founder of MedVest,  Inc. which,
since 1980, has provided  consulting services to health care and high technology
companies. He is also the Chief Executive Officer of UniMedica, Inc., a provider
of medical  educational  services and  materials.  Dr. Abeles is a member of the
Boards of Directors of I-Flow  Corporation,  Oryx  Technology,  Inc.,  Molecular
Diagnostics Inc. and Encore Medical Corporation.

      David M. Bartash,  is the President and founder of Bartash and Company,  a
consulting company which, since 1990, has been providing consulting services for
the  healthcare  industry,  including  research  for the  healthcare  investment
community and support services for venture start-ups.

      Jay  M.  Haft,   Esq.,  is  a  strategic  and  financial   consultant  for
growth-stage  companies.  He was a senior  corporate  partner of the law firm of
Parker,  Duryee,  Rosoff & Haft from 1989 to 1994 and was of  counsel to Parker,
Duryee, Rosoff & Haft and Reed Smith LLP until 2002. Mr. Haft is a member of the
Boards of Directors of DCAP Group Inc., Oryx  Technology  Corporation and Encore
Medical Corporation.


                                       65



      Richard C. Lufkin is the principal of Enterprise Development Associates, a
proprietorship  formed in 1985 which  provides  consulting  and venture  support
services  to early stage  technology-based  companies,  principally  in the life
sciences.  He is also a co-founder,  consultant  to, and former Chief  Financial
Officer of Linguagen Corp., a development-stage,  privately-held,  biotechnology
firm.

      Magnus Moliteus is a consultant to the healthcare industry and Chairman of
COM  Consulting  Inc., a privately held firm,  which  enhances  Swedish-American
relations particularly between health care companies. From 1995 to 2001, when he
became a full-time  consultant,  Mr.  Moliteus  served as Executive  Director of
Invest in Sweden Agency,  U.S., a Swedish government agency.  From 1977 to 1990,
he was Chief Executive Officer of Pharmacia, Inc. (now owned by Pfizer, Inc.)

      EXECUTIVE OFFICERS WHO ARE NOT DIRECTORS

      The name, age and position with the Company of each executive  officer who
is not a director of the Company is listed below, followed by summaries of their
backgrounds and principal occupations.  Executive officers are elected annually,
and serve at the discretion of the Board of Directors.




NAME                                         AGE      TITLE                                                  DATE ELECTED
----                                         ---      -----                                                  ------------
                                                                                                    
Mark C. Carota.........................       48      Vice President, Operations.....................          2/18/00

Peter M. Chakoutis.....................       38      Vice  President  and  Chief  Financial  Officer           1/1/04
                                                      (principal financial and accounting officer)...

Richard C. Christopher.................       34      Vice   President,    Financial   Planning   and
                                                      Business Analysis..............................           1/1/04

Scott L. Lundahl.......................       45      Vice  President,   Intellectual   Property  and
                                                      Regulatory Affairs.............................          6/23/99

Stuart L. Marcus, MD, Ph.D.............       57      Vice  President,   Scientific  Affairs;   Chief
                                                      Medical Officer................................         10/11/93

David Page.............................       44      Associate Vice President, Sales................          8/11/03

Paul A. Sowyrda........................       42      Vice President, Marketing and Sales............          8/01/00



      Mark C. Carota has been employed by the Company since October 1999.  Prior
to joining the Company, Mr. Carota was Director of Operations from November 1998
to October 1999 for Lavelle,  Inc., a privately held  manufacturer of orthopedic
instrumentation.  From July 1998 to November  1998,  Mr.  Carota was employed as
Director of Quality  Assurance by CGI Inc. Prior to joining CGI Inc., Mr. Carota
was  employed by Allergan  Inc.,  from  February  1997 to July 1998 where he had
responsibility for quality assurance, engineering and facilities.


                                       66


      Peter M.  Chakoutis has been employed by the Company since  December 2000.
Prior to his  promotion to his current  position on January 1, 2004, he held the
position  of  controller.  Prior to  joining  the  Company,  Mr.  Chakoutis  was
Financial Reporting Manager from December 1996 to December 2000 for State Street
Corporation,  a publicly traded  financial  holding company that provides a full
range of products and services for sophisticated global investors.

      Richard C.  Christopher  has been employed by the Company  since  December
2000. Prior to his promotion to his current position on January 1, 2004, he held
the position of Director,  Financial Analysis.  Prior to joining the Company, he
was the North American Cost Accounting Manager for Grace Construction  Products,
a unit of W.R.  Grace & Co. from April 1999 to December  2000.  Prior to joining
Grace Construction  Products,  Mr. Christopher was employed by the Boston Edison
Company  from March 1996 until April 1999.

      Scott L. Lundahl has been employed by the Company since May 1998. In 1994,
Mr.  Lundahl  co-founded  and became  Vice  President  of  Lumenetics,  Inc.,  a
privately-owned  medical device development  company,  which, prior to May 1998,
provided the Company  with  consulting  services in the light device  technology
area.

      Stuart L. Marcus, MD, Ph.D. has been employed by the Company since October
1993. Prior to joining the Company,  he was Director of the  Hematology/Oncology
Department of Daiichi  Pharmaceuticals Inc., and prior thereto he held positions
in the Medical Research  Division of the American  Cyanamid  Company,  directing
photodynamic therapy clinical development, among other assignments.

      David Page has been  employed by the Company  since August 2003.  Prior to
joining the Company,  Mr. Page was Vice President of Sales,  Aesthetic  Division
from July 2001 to August 2003 for Lumenis, Inc. From July 1999 to July 2001, Mr.
Page was Vice  President  of  Sales  for ESC  Medical  Systems  responsible  for
Aesthetic, Surgical and Veterinary US Markets.

      Paul A. Sowyrda,  has been employed by the Company since April 2000.  From
April 1998 to April 2000, Mr. Sowyrda was employed by Aurora Tech, a Division of
Carlo  Gavazzi,  where at the time of his  departure he was serving as President
and Chief Executive Officer. From October 1997 to February 1998, Mr. Sowyrda was
Vice President, Operations of UroMed Corp, Urovation Division.

AUDIT COMMITTEE FINANCIAL EXPERT

      Our Board of Directors has determined that Richard Lufkin, the Chairman of
our Audit Committee,  is an audit committee  financial  expert,  as that term is
defined under Regulation S-K, Item 401(h),  and that he is independent,  as that
term is used in Item 7(d)(3)(iv) of Schedule 14A under the Exchange Act.


                                       67



SECTION 16(A) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

      Under the securities laws of the United States,  the Company's  directors,
officers and any person  holding more than ten percent (10%) of our common stock
are required to report their  ownership  of  securities  and any changes in that
ownership to the Securities  and Exchange  Commission on Forms 3, 4 and 5. Based
on our review of the copies of such forms we have  received,  DUSA believes that
all of our  officers,  directors and  shareholders  holding ten percent (10%) or
more of our common stock  complied  with all filing  requirements  applicable to
them with respect to their  reporting  obligations  except for a single untimely
filing by Peter M.  Chakoutis  reporting  his initial  holdings of the Company's
securities  and one filing by Jay Haft  reporting  his indirect  acquisition  of
shares through his spouse in three transactions that occurred in 2002. In making
these statements, we have relied on the written representations of our directors
and officers and copies of the reports that they have filed with the  Securities
and Exchange Commission.

CODE OF ETHICS

      We have  adopted a Code of Ethics  within the  meaning  of Item  406(b) of
Regulation  S-K.  This  Code of Ethics  applies  to all our  executive  officers
including our principal executive officer and principal financial officer. If we
make  substantive  amendments  to this  Code of  Ethics  or  grant  any  waiver,
including any implicit waiver,  we will disclose the nature of such amendment in
a report on Form 8-K within five days of such amendment or waiver.

ITEM 11. EXECUTIVE COMPENSATION

DIRECTOR COMPENSATION

      Directors  who are employees of the Company  receive no cash  compensation
for their services as directors or as members of committees.  Outside  directors
receive  $25,000 per year, as annual  compensation,  regardless of the number of
Board  or  Committee  meetings  they  attend.  Directors  serving  on the  Audit
Committee  receive an  additional  $5,000  per year.  Also,  directors  are paid
out-of-pocket  expenses  related  to their  attendance.  Directors  are  awarded
options to purchase  15,000 shares of common stock on the earlier of thirty (30)
days  following  their  date of  election  or June 30th of their  first  year of
service as a member of the Board of Directors,  and options for 10,000 shares of
common stock on June 30th of each year following their reelection.


                                       68




EXECUTIVE COMPENSATION

      The following  table shows,  for the fiscal years ended December 31, 2003,
2002 and 2001, certain compensation paid by DUSA to its executive officers.  All
amounts are stated in United States dollars unless otherwise indicated.




                                             SUMMARY COMPENSATION TABLE
------------------------------------------------------------------------------------------------------------------------------------
                                                   ACTUAL COMPENSATION                          LONG-TERM COMPENSATION
                                       ----------------------------------------  ---------------------------------------------------
                                                                                           AWARDS                  PAYOUTS
                                                                                 -------------------------- ------------------------
                                                                       OTHER                                                  ALL
                                                                       ANNUAL     RESTRICTED                                 OTHER
                                                                       COMPEN-      STOCK                        LTIP       COMPEN-
                                                SALARY       BONUS     SATION1      AWARD(S)       OPTIONS     PAYOUTS      SATION
NAME AND PRINCIPAL POSITION            YEAR       ($)         ($)        ($)          ($)           (#)         ($)           ($)
-------------------------------------- ------ ---------- ----------- ----------- -------------- ----------- ------------ -----------
                                                                                                   
D. Geoffrey Shulman, MD, FRCPC,        2003     340,000     170,000       --          --           110,000      --            --
President, Chief Executive Officer     2002     340,000      64,600       --          --            60,000      --            --
                                       2001     340,000      84,460       --          --            25,000      --            --
-------------------------------------- ------ ---------- ----------- ----------- -------------- ----------- ------------ -----------
Mark C. Carota, Vice President,        2003     175,000      38,900       --          --            17,500      --            --
Operations                             2002     157,000      20,300       --          --            17,500      --            --
                                       2001     150,731      26,860       --          --             7,500      --            --
-------------------------------------- ------ ---------- ----------- ----------- -------------- ----------- ------------ -----------
Scott Lundahl, Vice President,         2003     182,000      40,400       --          --            17,500      --            --
Intellectual Property and Regulatory   2002     168,000      21,700       --          --            17,500      --            --
Affairs                                2001     134,462      27,060       --          --             7,500      --            --
-------------------------------------- ------ ---------- ----------- ----------- -------------- ----------- ------------ -----------
Stuart L. Marcus, MD, Ph.D., Vice      2003     250,000      55,500       --          --            17,500      --            --
President, Scientific Affairs and      2002     247,520      17,100       --          --            12,500      --            --
Chief Medical Officer                  2001     246,055      34,910       --          --             7,500      --            --
-------------------------------------- ------ ---------- ----------- ----------- -------------- ----------- ------------ -----------
Paul A. Sowyrda, Vice President,       2003     180,000      43,200       --          --            17,500      --            --
Marketing and Sales                    2002     164,800      21,300       --          --            17,500      --            --
                                       2001     154,350      26,550       --          --             7,500      --            --
-------------------------------------- ------ ---------- ----------- ----------- -------------- ----------- ------------ -----------


Notes:

      (1)   No officer had perquisites in excess of $50,000 or 10% of salary and
            bonus reported for 2003, 2002 or 2001.


                                       69



BOARD COMPENSATION COMMITTEE REPORT ON EXECUTIVE COMPENSATION

      The Compensation  Committee of the Board of Directors (the "Committee") is
composed of three (3) non-employee  directors.  The Committee is responsible for
setting and  administering  the policies which govern annual executive  salaries
and cash bonus awards,  and recommends  participants and amounts of stock option
awards to the Company's Board of Directors. The Committee evaluates, on a yearly
basis,  the  performance,  and  determines  the  compensation  of, the executive
officers  of  DUSA.  The  Committee   evaluates   compensation  based  upon  the
achievement  by the  individual  of  corporate  goals,  and the  performance  of
individual  responsibilities.  DUSA's President and Chief Executive Officer, Dr.
D. Geoffrey Shulman,  is not a member of the Committee,  however,  the Committee
seeks  input  from  Dr.  Shulman   regarding  the  performance  of  DUSA's  Vice
Presidents,  as well as his recommendations for their compensation.  Dr. Shulman
is present,  at the  invitation of the  Committee,  at its meetings,  other than
during consideration of his own compensation.

      DUSA's executive  compensation programs consist of base salary, cash bonus
incentives,  stock  option and stock grant  awards.  The goals of the  Company's
executive  officer  compensation  policies  are to attract,  retain,  and reward
executive officers who contribute to DUSA's success,  to align executive officer
compensation  with  DUSA's  performance  and to motivate  executive  officers to
achieve the Company's business objectives. The executive officers were evaluated
by the Committee against established goals for 2003,  including corporate goals,
the Company's  stock  performance  and  individual  goals within each  executive
officer's area of responsibility.

      With regard to base salary,  the Committee  believes that DUSA's  officers
should be  compensated  at levels  comparable  to the base  salary of  executive
officers at similar  small public  biotechnology  or  pharmaceutical  companies.
During 2000,  the  Committee  received  survey data  reporting  the salaries for
executives  of  companies  in these  groups  which was  prepared by  independent
consultants.  The  Committee  intends  to obtain  an  updated  report  regarding
executive  compensation for similarly  situated companies before the end of 2004
in order to stay apprised of current compensation practices at such companies.

      Generally,  DUSA's Vice  Presidents  are  eligible to receive up to 30% of
their base salary as a cash bonus award.  The  Committee  recognized  that these
individuals  largely achieved their personal goals and corporate goals which had
a positive  influence on shareholder  value for 2003.  Therefore,  the Committee
concluded that DUSA's overall operational performance,  particularly with regard
to  marketing  and  sales  functions,  consolidation  of  regulatory  functions,
enhanced medical  information  functions,  and approval of DUSA's  manufacturing
facility,  justified favorable consideration of bonuses for its Vice Presidents.
Accordingly,  DUSA's Vice  Presidents  received  cash bonus awards  ranging from
approximately 22% to 24% of their base salaries.  These cash awards were paid in
March 2004.


                                       70



      The  Committee  also is  using  the  2000  survey  data  from  independent
consultants to monitor and evaluate the long-term incentive  compensation levels
of its  officers  and  directors.  The  Committee  believes  that a strong stock
ownership program is essential to the long-term growth of the Company.  In 2004,
the Committee  granted to DUSA's key executive  officers awards of stock options
to emphasize  the  long-term  focus  required for success in the  pharmaceutical
industry.


COMPENSATION OF THE PRESIDENT AND CHIEF EXECUTIVE OFFICER

      The  Committee   exercised  its  subjective  judgment  and  discretion  in
determining  the amounts of Dr.  Shulman's base salary,  bonus award,  and stock
option awards for 2003. Dr.  Shulman's base salary and cash bonus award for 2003
were  determined  with  reference  to the  same  measures  used  for all  DUSA's
executive  officers,  but with  particular  emphasis on the  maintenance  of our
financial strength and meeting marketing and sales  expectations.  Dr. Shulman's
base  salary  for 2003 was  $340,000.  With  regard to a cash bonus  award,  Dr.
Shulman is eligible to receive up to 50% of base salary plus additional  amounts
for outstanding performance.  For 2003, Dr. Shulman's bonus award was 50% of his
base salary.  Dr.  Shulman's  bonus award was paid to him in 2004. For 2004, Dr.
Shulman  proposed  that his base salary remain  unchanged  from that of 2002 and
2003, which proposal was accepted by the Committee.


Jay M. Haft, Esq.
David M. Bartash
Magnus Moliteus



                                       71



                                PERFORMANCE GRAPH


           COMPARISON OF FIVE YEAR CUMULATIVE SHAREHOLDER TOTAL RETURN
                        AMONG DUSA PHARMACEUTICALS, INC.,
                     NASDAQ MARKET INDEX AND MG GROUP INDEX


                              [GRAPH APPEARS HERE]




                               1/1/1999    12/31/1999  12/29/2000  12/31/2001  12/31/2002  12/31/2003
                               --------    ----------  ----------  ----------  ----------  ----------
                                                                         
DUSA Pharmaceuticals, Inc.     $   100.00  $   386.44  $   227.97  $   109.15  $    22.12  $    68.47

Drug Manufacturers/Other           100.00      131.60      213.31      189.85      134.88      187.46

NASDAQ Market Index                100.00      176.37      110.86       88.37       61.64       92.68



      The graph above compares cumulative total shareholder return on our common
stock for the  five-year  period ended  December 31, 2003,  with the  cumulative
total return on the Nasdaq Market Index and the Media General Drug  Manufacturer
Index over the same period. The identity of those  corporations  included in the
Media  General  Financial  Services Drug  Manufacturer  Index may be obtained by
contacting   Ms.  Shari  Lovell,   Director  of   Shareholder   Services,   DUSA
Pharmaceuticals, Inc., 555 Richmond Street West, Suite 300, Toronto, Ontario M5V
3B1 Canada.

      The graph  assumes $100 was invested in DUSA's  common stock on January 1,
1999,  and in each of the  indices,  and that  dividends  were  reinvested.  The
comparisons in the graph are required by the Securities and Exchange  Commission
and are not intended to forecast or be indicative of possible future performance
of DUSA's common stock.


                                       72



OPTION GRANTS IN 2003

      The  following  grants of stock  options were made to the named  executive
officers during fiscal year 2003.




------------------------------------------------------------------------------------------------------------------------------------
                                                                                                         POTENTIAL REALIZABLE
                                                                                                           VALUE OF ASSUMED
                                                                                                      ANNUAL RATES OF STOCK PRICE
                                                     INDIVIDUAL GRANTS                               APPRECIATION FOR OPTION TERM(2)
------------------------- ------------------------------------------------------------------------- --------------------------------
                              NUMBER OF        PERCENT OF TOTAL
                              SECURITIES         OPTIONS/SARS
                              UNDERLYING          GRANTED TO        EXERCISE OF
                             OPTIONS/SARS        EMPLOYEES IN        BASE PRICE
NAME                           GRANTED(1)         FISCAL YEAR        ($/SHARE)     EXPIRATION DATE         5%              10%
------------------------- ------------------- -------------------- --------------- ---------------- --------------- ----------------
                                                                                                     
Dr. D. Geoffrey Shulman        100,000               25.5%             $1.60           3/13/13         $100,600        $255,000
                                10,000                2.6%             $2.51           6/30/13         $ 15,800        $ 40,000
------------------------- ------------------- -------------------- --------------- ---------------- --------------- ----------------
Mr. Mark C. Carota              17,500                4.5%             $1.60           3/13/13         $ 17,600        $ 44,600
------------------------- ------------------- -------------------- --------------- ---------------- --------------- ----------------
Mr. Scott Lundahl               17,500               4.5%              $1.60           3/13/13         $ 17,600        $ 44,600
------------------------- ------------------- -------------------- --------------- ---------------- --------------- ----------------
Dr. Stuart L. Marcus            17,500               4.5%              $1.60           3/13/13         $ 17,600        $ 44,600
------------------------- ------------------- -------------------- --------------- ---------------- --------------- ----------------
Mr. Paul A. Sowyrda             17,500               4.5%              $1.60           3/13/13         $ 17,600        $ 44,600
------------------------- ------------------- -------------------- --------------- ---------------- --------------- ----------------



Notes:

(1)   All options in this table have been  granted  pursuant to the 1996 Omnibus
      Plan,  as amended.  The options  have  exercise  prices  equal to the fair
      market value on the date of the grant.

(2)   The  potential  realizable  value is  calculated  based on the fair market
      value of DUSA's common stock on the date of the grant.  These amounts only
      represent  certain assumed rates of  appreciation  established by the SEC.
      There can be no assurance that the amounts  reflected in this table or the
      associated rates of appreciation will be achieved.


                                       73



AGGREGATED  STOCK OPTION EXERCISES IN LAST FISCAL YEAR AND FISCAL YEAR-END STOCK
OPTION VALUES

      The  following  table  provides  certain  information  as to certain stock
options  exercisable by the named  executive  officers for the fiscal year 2003,
and the value of such options  held by them at December  31,  2003,  measured in
terms of the closing  price of the  Company's  common  stock on The Nasdaq Stock
Market on December 31, 2003 which was $5.05 per share.




----------------------------------------------------------------------------------------------------------------------------------
                                                                           NUMBER OF UNEXERCISED         VALUE OF UNEXERCISED
                                                                          OPTIONS AT DECEMBER 31,      IN-THE-MONEY OPTIONS AT
                               SHARES ACQUIRED                               2003 EXERCISABLE/            DECEMBER 31, 2003
        NAME                   ON EXERCISE (#)     VALUE REALIZED ($)          UNEXERCISABLE          EXERCISABLE/ UNEXERCISABLE
----------------------------------------------------------------------------------------------------------------------------------
                                                                                          
Dr. D. Geoffrey Shulman              --                    --                    671,250/                     $110,275/
                                                                                  193,750                      $249,250
----------------------------------------------------------------------------------------------------------------------------------
Mr. Mark C. Carota                   --                    --                     35,625/                      $5,163/
                                                                                  36,875                       $75,863
----------------------------------------------------------------------------------------------------------------------------------
Mr. Scott L. Lundahl                 --                    --                    109,375/                      $19,413/
                                                                                  38,125                       $75,863
----------------------------------------------------------------------------------------------------------------------------------
Dr. Stuart L. Marcus                 --                    --                    175,625/                      $3,688/
                                                                                  36,875                       $71,438
----------------------------------------------------------------------------------------------------------------------------------
Mr. Paul A. Sowyrda                  --                    --                     30,625/                      $5,163/
                                                                                  41,875                       $75,863
----------------------------------------------------------------------------------------------------------------------------------



OTHER COMPENSATION

      The Company has employment  agreements with each of the executive officers
named in the  Summary  Compensation  Table.  Pursuant to these  agreements,  the
executive  officers are entitled to receive  compensation  as  determined by the
Board of  Directors  and are  eligible to receive the  benefits  generally  made
available  to  employees  of the  Company.  DUSA  may  terminate  any  of  these
agreements  at any time,  with or without cause on sixty (60) days prior written
notice.  If  employment is terminated  without  cause,  DUSA has agreed to pay a
severance   allowance   equivalent  to  one  year  of  the  executive  officer's
then-current base salary payable in a lump sum, within sixty (60) days following
the date of termination.  In addition to the foregoing, Dr. Shulman's employment
agreement  also provides that he shall have the right to exercise,  for a period
of one year from the date of termination, all stock options granted to him prior
to his  termination as to all or any part of the shares covered by such options,
including  shares with  respect to which such  options  would not  otherwise  be
exercisable, subject to restrictions under U.S. or Canadian law.

      In the event an executive  officer  should die while employed by DUSA, his
heirs or  beneficiaries  will be entitled to any Company paid death  benefits in
force at the time of such death and will also be entitled to exercise any vested
but  unexercised  stock options which were held by him at the time of his death,
within a period of one (1) year from the date of death.


                                       74



      These employment  agreements also provide for certain  severance  benefits
following a change in control of the Company and termination of employment. Upon
any "change of  control,"  as defined in the  agreements,  DUSA shall pay to the
executive  officer a lump sum  payment  equal to three (3) times his base salary
for the last fiscal year within five (5) days after such termination.

      Under the Company's 1996 Omnibus Plan, as amended, any and all outstanding
options  not  fully  vested  shall  automatically  vest in  full  and  shall  be
immediately  exercisable  upon a "change  of  control,"  as defined in the grant
agreements.   The  date  on  which  such   accelerated   vesting  and  immediate
exercisability shall occur, shall be the date of the occurrence of the change of
control.

ITEM 12.  SECURITY  OWNERSHIP OF CERTAIN  BENEFICIAL  OWNERS AND  MANAGEMENT AND
          RELATED STOCKHOLDER MATTERS


      The  following  table sets forth certain  information  with respect to the
beneficial  ownership of DUSA's common stock as of March 1, 2004 by: (i) each of
our directors; (ii) our named executive officers; (iii) all beneficial owners of
greater than 5% of our outstanding  common stock;  and (iv) all of our directors
and executive officers as a group.




                                                                                NUMBER OF SHARES                PERCENTAGE OF
     NAME(1)                                                                  BENEFICIALLY OWNED(2)          OUTSTANDING SHARES (3)
     -------                                                                  ---------------------          ----------------------
                                                                                                       
    John H. Abeles, MD  ..........................................                    89,500 (4)                          *

    David M. Bartash  ............................................                    50,500 (5)                          *

    Mark C. Carota  ..............................................                    48,815 (6)                          *

    Jay M. Haft, Esq.  ...........................................                   103,250 (7)                          *

    Richard C. Lufkin ............................................                    97,100 (8)                          *

    Scott L. Lundahl  ............................................                   118,957 (9)                          *

    Stuart L. Marcus, MD, Ph.D.  .................................                   191,250 (10)                       1.15%

    Magnus Moliteus  .............................................                    15,000 (11)                         *

    D. Geoffrey Shulman, MD, FRCPC  ..............................                 1,107,668 (12)                       6.46%

    Paul A. Sowyrda  .............................................                    46,250 (13)                         *

    All directors and executive  officers as a group
    (consisting of 14 persons)  ..................................                 1,938,603 (14)                      10.67%

    Dimensional Fund Advisors, Inc.  .............................                   885,800 (15)                       6.34%

    Royce & Associates, Inc.  ....................................                 1,225,600 (16)                       8.78%

    Mr. Jeffrey Casdin and affiliated entities  ..................                 2,167,300 (17)                       15.5%

    Investors Group Inc. and its affiliated entities                               1,120,800 (18)                        8.0%


*  Less than 1%.

Notes:

(1)   Unless indicated otherwise,  the individuals listed herein have a business
      mailing  address  of c/o  DUSA  Pharmaceuticals,  Inc.,  25  Upton  Drive,
      Wilmington, Massachusetts, 01887.


                                       75



(2)   Unless  indicated  otherwise,  the  individuals and entities listed herein
      have the sole power to both vote and dispose of all  securities  that they
      beneficially own.

(3)   The percentage of ownership as calculated  above includes in the number of
      shares  outstanding  for each  individual  listed  those  shares  that are
      beneficially,  yet not directly, owned. Applicable percentage of ownership
      is based on  16,391,372  shares of common stock  outstanding  on March 10,
      2004 unless noted as otherwise.

(4)   65,000 of the shares indicated  represent shares with respect to which Dr.
      Abeles has the right to acquire  through the  exercise of options.  Of the
      shares  indicated,  Dr.  Abeles  shares  investment  and voting power with
      regard 24,500 shares.

(5)   35,000 of the shares indicated  represent shares with respect to which Mr.
      Bartash has the right to acquire through the exercise of options.

(6)   48,750 of the shares indicated  represent shares with respect to which Mr.
      Carota has the right to acquire  through the  exercise  of options.  Under
      Rule 13d-3 of the  Securities  and Exchange Act of 1934,  as amended,  Mr.
      Carota  disclaims,  but may be  deemed to be the  beneficial  owner of, 15
      shares of common  stock that are held by his adult son and 50 shares  held
      by his daughter, both of whom are members of Mr. Carota's household.

(7)   68,750 of the shares indicated  represent shares with respect to which Mr.
      Haft has the right to acquire through the exercise of options.  Under Rule
      13d-3 of the  Securities  and Exchange Act of 1934,  as amended,  Mr. Haft
      disclaims,  but may be deemed to be the beneficial owner of, 34,500 shares
      that are held by his spouse.

(8)   95,000 of the shares indicated  represent shares with respect to which Mr.
      Lufkin has the right to acquire through the exercise of options.

(9)   113,750 of the shares indicated represent shares with respect to which Mr.
      Lundahl has the right to acquire through the exercise of options.

(10)  All of the shares  indicated  represent  shares with  respect to which Dr.
      Marcus has the right to acquire  through  the  exercise  of  options.  Dr.
      Marcus' address is 400 Columbus Avenue, Valhalla, New York, NY 10595.

(11)  All of the shares  indicated  represent  shares with  respect to which Mr.
      Moliteus has the right to acquire through the exercise of options.

(12)  300,000 of the shares indicated represent shares with respect to which Dr.
      Shulman  has the right to  acquire  through  the  exercise  of his Class B
      Warrants  which  have an  exercise  price of CDN  $6.79 per  Warrant,  and
      750,000 of such shares  represent shares with respect to which Dr. Shulman
      has the right to acquire  through the exercise of options.  Dr.  Shulman's
      address is 555 Richmond Street West, Suite 300,  Toronto,  Ontario M5V 3B1
      Canada.

(13)  All of the shares  indicated  represent  shares with  respect to which Mr.
      Sowyrda has the right to acquire through the exercise of options.

(14)  All of the shares indicated, Class B Warrants and options, as the case may
      be, as discussed in footnotes (4) through (13) above are included, as well
      as 1,478,000 shares which may be acquired through the exercise of options.

(15)  The  number  of  shares  beneficially  owned  is  based  upon  information
      disclosed by Dimensional Fund Advisors Inc. on a Schedule 13G/A filed with
      the  Securities and Exchange  Commission on February 6, 2004.  Dimensional
      Fund  Advisors  Inc.'s  address is 1299 Ocean  Avenue,  11th Floor,  Santa
      Monica, CA 90401.

(16)  The  number  of  shares  beneficially  owned  is  based  upon  information
      disclosed by Royce & Associates,  Inc. on a Schedule  13G/A filed with the
      Securities  and  Exchange   Commission  on  February  2,  2004.   Royce  &
      Associates,  Inc.'s address is 1414 Avenue of the Americas,  New York, New
      York 10019.

(17)  The  number  of  shares  beneficially  owned  is  based  upon  information
      disclosed  by Jeffrey  Casdin and his  affiliated  entities  on a Schedule
      13G/A filed with the  Securities  and Exchange  Commission on February 17,
      2004. The number of shares includes 567,400 shares  beneficially  owned by
      CLSP, L.P.,  768,500 shares  beneficially  owned by CLSP II, L.P., 223,600
      shares  beneficially owned by CLSP/SBS I, L.P., 65,300 shares beneficially
      owned by CLSP/SBS II, L.P.,  542,500 shares  beneficially  owned by Cooper
      Hill Partners,  L.P.,  1,624,800 shares  beneficially owned by Cooper Hill
      Partners,  LLC,  2,167,300  shares  beneficially  owned by Casdin Capital,
      L.L.C. and 2,167,300 shares  beneficially owned by Jeffrey Casdin.  Cooper
      Hill Partners,  LLC is the sole general partner of each entity and has the
      power to vote and dispose of the securities owned by each entity.  Jeffrey
      Casdin is the managing member of Cooper Hill Partners,  LLC. Mr. Casdin is
      the managing member of Casdin Capital,  LLC, the general partner of Cooper
      Hill Partners, L.P. Mr. Casdin's address is 230 Park Avenue, New York, New
      York 10169.


                                       76



(18)  The  number  of  shares  beneficially  owned  is  based  upon  information
      disclosed  by  Investors  Group  Inc.  and its  affiliated  entities  on a
      Schedule  13G/A  filed with the  Securities  and  Exchange  Commission  on
      February 17, 2004.  The number of shares listed  includes  582,700  shares
      beneficially  owned by Investors  Canadian Small Cap Fund,  529,800 shares
      beneficially  owned by Investors  Canadian  Small Cap Growth  Fund,  6,000
      shares  beneficially  owned by Investors  Canadian Small Cap Class,  2,300
      shares  beneficially  owned by Investors  Canadian Small Cap Growth Class,
      1,120,800  beneficially  owned  by  I.G.  Investment   Management,   Ltd.,
      1,112,500  shares  beneficially  owned by Investors  Group Trust Co. Ltd.,
      1,112,500  shares  beneficially  owned by Investors Group Inc.,  1,112,500
      shares beneficially owned by Investors Group Trustco Inc. and 8,300 shares
      beneficially owned by Investors Group Corporate Class Inc. Investors Group
      Inc.  owns 100% of the issued  and  outstanding  Class A Common  Shares of
      Investors Group Trustco Inc. Investors Group Trustco Inc. owns 100% of the
      issued  and  outstanding  Class A Common  Shares  of the  Investors  Group
      Management  Ltd.  Investors  Group  Trustco  Inc.  also owns,  directly or
      indirectly,  100% of the  issued  and  outstanding  Common  Shares  of the
      Investors  Group Trust Co. Ltd.  Investors  Group Trustco Inc.,  Investors
      Group Management Ltd.,  Investors Group Trust Co. Ltd., Investors Canadian
      Small Cap Fund and Investors Canadian Small Cap Growth Fund are ultimately
      controlled  by Investors  Group Inc.  through its ownership of 100% of the
      issued and  outstanding  Class A Common Shares of Investors  Group Trustco
      Inc.  Power  Financial  Corporation  owns  56.1%  of the  common  stock of
      Investors  Group  Inc.  Power  Corporation  of Canada,  of which Mr.  Paul
      Desmarais  controls  64.7% of the voting  power,  owns 67.4% of the common
      stock of Power  Financial  Corporation.  Investors Group Inc.'s address is
      One Canada Centre, 447 Portage Avenue, Winnipeg, Manitoba R3C 3B6 Canada.

EQUITY COMPENSATION PLAN INFORMATION

      The  following  table  provides  information  as of December 31, 2003 with
respect  to  shares  of  DUSA's  common  stock  that  may be  issued  under  our
outstanding options, warrants and other rights.




--------------------------------------- --------------------------- --------------------------- ------------------------------------
                                                     (A)                        (B)                              (C)
                                        --------------------------- --------------------------- ------------------------------------
                                         NUMBER OF SECURITIES TO BE  WEIGHTED-AVERAGE EXERCISE     NUMBER OF SECURITIES REMAINING
                                           ISSUED UPON EXERCISE OF     PRICE OF OUTSTANDING      AVAILABLE FOR FUTURE ISSUANCE UNDER
                                            OUTSTANDING OPTIONS,      OPTIONS, WARRANTS AND     EQUITY COMPENSATION PLANS (EXCLUDING
PLAN CATEGORY                                WARRANTS OR RIGHTS               RIGHTS             SECURITIES REFLECTED IN COLUMN (A))
--------------------------------------- --------------------------- --------------------------- ------------------------------------
                                                                                       
Equity  compensation plans approved by
security holders                                  2,319,950                   $11.656                         506,8561
--------------------------------------- --------------------------- --------------------------- ------------------------------------
Equity    compensation    plans    not
approved by security holders                        425,000(2)                 $6.987                             N/A
--------------------------------------- --------------------------- --------------------------- ------------------------------------
      Total                                       2,744,950                   $10.933                         506,856(1)
--------------------------------------- --------------------------- --------------------------- ------------------------------------


Note:

(1)   The 1996 Omnibus  Plan, as amended,  provides  that the maximum  number of
      shares with respect to which awards may be granted shall not exceed 20% of
      the Company's common stock outstanding or a maximum of 2,753,328 shares.

(2)   This number  includes  shares that may be issued upon the  exercise of the
      following:  (i) A Class B warrant granted to Dr.  Shulman,  our President,
      CEO and CFO,  for the  issuance  of 300,000  shares of common  stock.  The
      exercise  price of the  warrant  is  $6.00  per  share.  This  warrant  is
      exercisable  and has an expiration  date of January 29, 2007; (ii) Options
      to  purchase a total of 85,000  shares of common  stock  with an  exercise
      price of $10.875 per share. This option was granted to PARTEQ Research and
      Development  Innovations,  the licensor of certain patents  underlying our
      Levulan(R)  PDT/PD systems,  on October 21, 1997.  PARTEQ has subsequently
      assigned the right to acquire  26,911  shares under this option to certain
      individuals. These options have ten (10) year terms and vested at the rate
      of 25% per year  beginning  on the  first  anniversary  of the date of the
      original  grant;  (iii)  Options to purchase  15,000  shares of our common
      stock issued to  Therapeutics,  Inc., a consultant  to the Company,  which
      were granted on March 13, 1997.  These  options have an exercise  price of
      $6.125  per share,  ten (10) year  terms and  vested  20% per year.  These
      options  have been  subsequently  assigned  by  Therapeutics,  Inc. to its
      principal;  and (iv) Options to purchase 25,000 shares of our common stock
      with an exercise price of $6.125 per share.  These options were granted to
      Lumenetics,  Inc., our former light device consultant,  on March 13, 1997.
      They  have  been  subsequently   assigned  by  Lumenetics,   Inc.  to  its
      principals.  These options have ten (10) year terms and vested at the rate
      of 25% per year beginning on the date of the original grant.


                                       77


ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

      None.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

AUDIT FEES

      The  aggregate  fees  billed by  Deloitte  & Touche  LLP for  professional
services rendered for the audit of the Company's annual financial statements for
the fiscal years ended  December  31, 2003 and 2002,  and for the reviews of the
financial  statements  included in the Company's  Quarterly Reports on Form 10-Q
for fiscal years 2003 and 2002 were $92,000 and $114,000, respectively.

AUDIT RELATED FEES

      Other  than the fees  described  under the  caption  "Audit  Fees"  above,
Deloitte & Touche LLP did not bill any fees for  services  rendered to us during
fiscal years 2003 and 2002 for assurance and related services in connection with
the audit or review of our consolidated financial statements.

TAX FEES

      The aggregate  fees billed by Deloitte & Touche LLP for services  rendered
to the Company,  for tax  services for the fiscal years ended  December 31, 2003
and 2002, were $20,000 and $14,000, respectively.

ALL OTHER FEES

      There  were no fees  billed  by  Deloitte  & Touche  LLP for  professional
services rendered for the fiscal year ended December 31, 2003 and 2002.

POLICY  ON AUDIT  COMMITTEE  PRE-APPROVAL  OF AUDIT  AND  PERMISSIBLE  NON-AUDIT
SERVICES OF INDEPENDENT AUDITORS

      In  considering  the nature of the  services  provided by the  independent
auditor,  which were pre-approved in accordance with procedures  required by the
Audit Committee Charter,  the Audit Committee  determined that such services are
compatible with the provision of independent audit services. The Audit Committee
discussed these services with the independent  auditor and Company management to
determine  that they are permitted  under the rules and  regulations  concerning
auditor independence  promulgated by the SEC to implement the Sarbanes-Oxley Act
of 2002, as well as the American Institute of Certified Public Accountants.


                                       78



ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

      A.    List of Financial Statements and Schedules


                                                                          Page
                                                                         Number
                                                                         ------

           INCLUDED IN ANNUAL REPORT TO SHAREHOLDERS
           INCORPORATED HEREIN BY REFERENCE:

           Independent Auditors' Report....................................F-1
           Consolidated Balance Sheets.....................................F-2
           Consolidated Statements of Operations...........................F-3
           Consolidated Statements of Shareholders' Equity.................F-4
           Consolidated Statements of Cash Flows...........................F-5
           Notes to the Consolidated Financial Statements..................F-6



      Schedules are omitted  because they are not required or the information is
included in Notes to the Consolidated Financial Statements.

      B.    Reports on Form 8-K

            a) Form 8-K,  filed on  October  27,  2003,  announcing  that it had
            hired, trained and deployed an initial sales force.

      C.    Exhibits filed as part of this Report

           3(a.1)     Certificate of Incorporation, as amended, filed as Exhibit
                      3(a) to the  Registrant's  Form 10-K for the  fiscal  year
                      ended  December 31, 1998,  and is  incorporated  herein by
                      reference;

           3(a.2)     Certificate   of   Amendment   to   the   Certificate   of
                      Incorporation,  as  amended,  dated  October  28, 2002 and
                      filed as Exhibit 99.3 to the Registrant's Quarterly Report
                      on Form 10-Q for the fiscal  quarter  ended  September 30,
                      2002, filed November 12, 2002 and  incorporated  herein by
                      reference; and

           3(b)       By-laws of the Registrant.

           4(a)       Common  Stock  specimen,  filed  as  Exhibit  4(a)  to the
                      Registrant's  Form 10-K for the fiscal year ended December
                      31, 2002, and is incorporated herein by reference;

           4(b)       Class B Warrant,  filed as Exhibit 4.3 to the Registrant's
                      Registration  Statement on Form S-1, No. 33-43282,  and is
                      incorporated herein by reference;


                                       79



           4(c)       Rights  Agreement  filed as  Exhibit  4.0 to  Registrant's
                      Current Report on Form 8-K dated September 27, 2002, filed
                      October 11, 2002, and is incorporated herein by reference;
                      and

           4(d)       Rights  Certificate  relating  to the  rights  granted  to
                      holders of common stock under the Rights  Agreement  filed
                      as Exhibit 4.0 to Registrant's Current Report on Form 8-K,
                      dated  September 27, 2002,  filed October 11, 2002, and is
                      incorporated herein by reference.

           10(a)      License Agreement  between the Company,  PARTEQ and Draxis
                      Health Inc.  dated August 27, 1991,  filed as Exhibit 10.1
                      to the  Registrant's  Registration  Statement on Form S-1,
                      No. 33-43282, and is incorporated herein by reference;

           10(b)      ALA Assignment Agreement between the Company,  PARTEQ, and
                      Draxis Health Inc. dated October 7, 1991, filed as Exhibit
                      10.2 to the  Registrant's  Registration  Statement on Form
                      S-1,  No.   33-43282,   and  is  incorporated   herein  by
                      reference;

           10(b.1)    Amended  and  Restated  Assignment  Agreement  between the
                      Company and Draxis  Health,  Inc.  dated  April 16,  1999,
                      filed as Exhibit 10(b.1) to the Registrant's Form 10-K for
                      the  fiscal  year  ended   December  31,   1999,   and  is
                      incorporated herein by reference;

           10(b.2)    Termination and Transfer Agreement between the Company and
                      Draxis Health Inc. dated as of February 24, 2004, portions
                      of which  have been  omitted  pursuant  to a  request  for
                      confidential  treatment  pursuant  to  Rule  24b-2  of the
                      Securities Exchange Act of 1934, as amended;

           10(c)      Employment  Agreement of D.  Geoffrey  Shulman,  MD, FRCPC
                      dated  October  1,  1991,  filed  as  Exhibit  10.4 to the
                      Registrant's  Registration  Statement  on  Form  S-1,  No.
                      33-43282, and is incorporated herein by reference;

           10(d)      Amendment to Employment  Agreement of D. Geoffrey Shulman,
                      MD, FRCPC dated April 14,  1994,  filed as Exhibit 10.4 to
                      the Registrant's  Registration  Statement on Form S-2, No.
                      33-98030, and is incorporated hereby by reference;

           10(e)      Amended and Restated License Agreement between the Company
                      and PARTEQ dated March 11, 1998, filed as Exhibit 10(e) to
                      the  Registrant's  Form  10-K/A  filed on June  18,  1999,
                      portions  of  Exhibit A have been  omitted  pursuant  to a
                      request for confidential  treatment pursuant to Rule 24b-2
                      of the Securities Exchange Act of 1934, as amended, and is
                      incorporated herein by reference;

           10(f)      Incentive  Stock  Option Plan,  filed as Exhibit  10.11 of
                      Registrant's  Registration  Statement  on  Form  S-1,  No.
                      33-43282, and is incorporated herein by reference;

           10(g)      1994 Restricted  Stock Option Plan,  filed as Exhibit 1 to
                      Registrant's Schedule 14A definitive Proxy Statement dated
                      April 26, 1995, and is incorporated herein by reference;


                                       80



           10(h)      1996  Omnibus  Plan,  as  amended,  filed as Appendix A to
                      Registrant's Schedule 14A Definitive Proxy Statement dated
                      April 26, 2001, and is incorporated herein by reference;

           10(h.1)    1996 Omnibus Plan, as amended on May 1, 2003

           10(i)      Purchase  and Supply  Agreement  between  the  Company and
                      National  Biological  Corporation  dated November 5, 1998,
                      filed as Exhibit  10(i) to the  Registrant's  Form  10-K/A
                      filed on June  18,  1999,  portions  of  which  have  been
                      omitted pursuant to a request for  confidential  treatment
                      pursuant to Rule 24b-2 of the  Securities  Exchange Act of
                      1934, as amended, and is incorporated herein by reference;

           10(j)      Supply Agreement between the Company and Sochinaz SA dated
                      December 24, 1993,  filed as Exhibit 10(q) to Registrant's
                      Form  10-K/A  filed on March 21,  2000,  portions of which
                      have been omitted  pursuant to a request for  confidential
                      treatment   pursuant  to  Rule  24b-2  of  the  Securities
                      Exchange  Act of 1934,  as  amended,  and is  incorporated
                      herein by reference;

           10(j.1)    First  Amendment to Supply  Agreement  between the Company
                      and  Sochinaz  SA dated  July 7,  1994,  filed as  Exhibit
                      10(q.1) to Registrant's Annual Report on Form 10-K for the
                      fiscal year ended December 31, 1999,  and is  incorporated
                      herein by reference;

           10(j.2)    Second Amendment to Supply  Agreement  between the Company
                      and  Sochinaz  SA  dated  as of June  20,  2000,  filed as
                      Exhibit 10.1 to  Registrant's  Current  Report on Form 8-K
                      dated  June  28,  2000,  and  is  incorporated  herein  by
                      reference;

           10(k)      Master   Service   Agreement   between   the  Company  and
                      Therapeutics,  Inc. dated as of October 4, 2001,  filed as
                      Exhibit 10(b) to the Registrant's Quarterly Report on Form
                      10-Q for the fiscal  quarter  ended  September  30,  2001,
                      filed  November  8,  2001,  portions  of which  have  been
                      omitted pursuant to a request for  confidential  treatment
                      under Rule 24b-2 of the  Securities  Exchange Act of 1934,
                      as amended and is incorporated herein by reference;

           10(l)      Commercial  Loan  Agreement,  Secured Term Loan Promissory
                      Note and Pledge and Security Agreement between the Company
                      and  Citizens  Bank of  Massachusetts  dated May 13,  2002
                      filed as Exhibit 99.1 to the Registrant's Quarterly Report
                      on Form 10-Q for the fiscal  quarter ended March 31, 2002,
                      filed May 14, 2002, and is incorporated herein;

           10(m)      Collaboration  Termination Agreement,  effective September
                      1,  2002,   between  the  Company  and  Schering  AG,  the
                      Company's former marketing partner, filed as Exhibit 10 to
                      Registrant's  Current  Report on Form 8-K dated August 27,
                      2002, and is incorporated herein by reference;

           10(n)      License and Development  Agreement between the Company and
                      Photonamic  GmbH & Co. KG dated as of December  30,  2002,
                      filed as Exhibit  10(r) to  Registrant's  Annual Report on
                      Form 10-K for the fiscal  year ended  December  31,  2002,
                      portions of which have been omitted  pursuant to a request
                      for  confidential  treatment  under  Rule  24(b)-2  of the
                      Securities  Exchange  Act  of  1934,  as  amended  and  is
                      incorporated herein by reference; and


                                       81



           10(o)      Supply Agreement  between the Company and medac GmbH dated
                      as of  December  30,  2002,  filed  as  Exhibit  10(r)  to
                      Registrant's  Annual  Report on Form  10-K for the  fiscal
                      year ended December 31, 2002,  portions of which have been
                      omitted pursuant to a request for  confidential  treatment
                      under Rule 24(b)-2 of the Securities Exchange Act of 1934,
                      as amended and is incorporated herein by reference.

           10(p)      Securities  Purchase  Agreement  dated as of February  27,
                      2004,  by and among the  Company  and  certain  investors,
                      filed as Exhibit 10.1 to the  Registrant's  current report
                      on Form 8-K,  filed on March 2,  2004,  portions  of which
                      have been omitted  pursuant to a request for  confidential
                      treatment under Rule 24(b) of the Securities  Exchange Act
                      of  1934,  as  amended,  and  is  incorporated  herein  by
                      reference;

           10(q)      Registration  Rights  Agreement  dated as of February  27,
                      2004 by and among the Company and certain investors, filed
                      as Exhibit 10.2 to the Registrant's current report on Form
                      8-K, filed on March 2, 2004, and is incorporated herein by
                      reference;

           10(r)      Form of Additional  Investment  Right dated as of February
                      27,  2004,  filed  as  Exhibit  10.3  to the  Registrant's
                      current report on Form 8-K, filed on March 2, 2004, and is
                      incorporated herein by reference; and

           10(s)      Investment  Banking  Agreement  between  the  Company  and
                      Sunrise Securities Corp. entered into February 27, 2004.

           14(a)      Form  of  DUSA   Pharmaceuticals,   Inc.  Code  of  Ethics
                      Applicable to Senior Officers.

           21(a)      Subsidiary of Registrant.

           23(a)      Independent Auditors' Consent of Deloitte & Touche LLP.

           31(a)      Rule   13a-14(a)/15d-14(a)   Certification  of  the  Chief
                      Executive Officer; and

           31(b)      Rule   13a-14(a)/15d-14(a)   Certification  of  the  Chief
                      Financial Officer.

           32(a)      Certification  of the Chief Executive  Officer pursuant to
                      18 U.S.C. Section 1350, as adopted pursuant to Section 906
                      of the Sarbanes-Oxley Act of 2002; and

           32(b)      Certification  of the Chief Financial  Officer pursuant to
                      18 U.S.C. Section 1350, as adopted pursuant to Section 906
                      of the Sarbanes-Oxley Act of 2002.

           99(a)      Press Release dated March 16, 2004.


                                       82



INDEPENDENT AUDITORS' REPORT


Board of Directors
DUSA Pharmaceuticals, Inc.
Wilmington, Massachusetts

We  have  audited  the   accompanying   consolidated   balance  sheets  of  DUSA
Pharmaceuticals, Inc. and its subsidiary (the "Company") as of December 31, 2003
and 2002, and the related consolidated  statements of operations,  shareholders'
equity and cash flows for each of the three years in the period  ended  December
31, 2003.  These financial  statements are the  responsibility  of the Company's
management.  Our  responsibility  is to express  an  opinion on these  financial
statements based on our audits.

We conducted our audits in accordance with auditing standards generally accepted
in the  United  States of  America.  Those  standards  require  that we plan and
perform the audit to obtain  reasonable  assurance  about  whether the financial
statements are free of material misstatement.  An audit includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements.  An audit also includes assessing the accounting principles used and
significant  estimates  made by  management,  as well as evaluating  the overall
financial  statement  presentation.   We  believe  that  our  audits  provide  a
reasonable basis for our opinion.

In our opinion,  such consolidated  financial  statements present fairly, in all
material respects, the financial position of the Company as of December 31, 2003
and 2002,  and the results of its  operations and its cash flows for each of the
three years in the period ended December 31, 2003, in conformity with accounting
principles generally accepted in the United States of America.


/s/ DELOITTE & TOUCHE LLP


Boston, Massachusetts
March 11, 2004



                                      F-1



DUSA PHARMACEUTICALS, INC.
CONSOLIDATED BALANCE SHEETS
--------------------------------------------------------------------------------



                                                                        DECEMBER 31,
                                                             --------------------------------
                                                                     2003                2002
                                                             ------------        ------------
ASSETS

CURRENT ASSETS
                                                                           
    Cash and cash equivalents                                $  4,294,482        $  6,926,713
    United States government securities                        30,284,841          42,498,617
    Accrued interest receivable                                   533,796             699,664
    Accounts receivable                                           229,483              36,720
    Inventory                                                     712,831           1,188,659
    Prepaids and other current assets                           1,000,413             915,704
                                                             ------------        ------------
       TOTAL CURRENT ASSETS                                    37,055,846          52,266,077
    Restricted cash                                               139,213             137,883
    United States government securities                         3,250,940           3,316,330
    Property, plant and equipment, net                          4,251,489           5,229,683
                                                             ------------        ------------
TOTAL ASSETS                                                   44,697,488        $ 60,949,973
                                                             ============        ============
LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES
    Accounts payable                                         $    859,282        $    552,891
    Accrued payroll                                               796,618             476,602
    Other accrued expenses                                      1,162,139           2,070,150
    Current maturities of long-term debt                          270,000             270,000
    Deferred revenue                                              129,900               5,100
                                                             ------------        ------------
       TOTAL CURRENT LIABILITIES                                3,217,939           3,374,743
    Long-term debt, net of current                              1,247,500           1,517,500
                                                             ------------        ------------
TOTAL LIABILITIES                                               4,465,439           4,892,243
                                                             ------------        ------------
Commitments and Contingencies (Note 15)

SHAREHOLDERS' EQUITY
    Capital Stock
     Authorized: 100,000,000 shares; 40,000,000
     shares designated as common stock, no par,
     60,000,000 shares issuable in series or
     classes; and 40,000 junior Series A preferred
     shares. Issued and outstanding: 13,966,247
     (2002: 13,887,612) shares of common stock, no par         95,670,554          95,490,561
    Additional paid-in capital                                  2,015,586           2,015,586
    Accumulated deficit                                       (58,909,781)        (44,082,927)
    Accumulated other comprehensive income                      1,455,690           2,634,510
                                                             ------------        ------------
TOTAL SHAREHOLDERS' EQUITY                                     40,232,049          56,057,730
                                                             ------------        ------------
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY                   $ 44,697,488        $ 60,949,973
                                                             ============        ============



See the accompanying Notes to the Consolidated Financial Statements.


                                      F-2



DUSA PHARMACEUTICALS, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS
--------------------------------------------------------------------------------



                                                                                      YEAR ENDED DECEMBER 31,
                                                                        ---------------------------------------------------
                                                                                2003                2002               2001
                                                                        ------------        ------------       ------------
                                                                                                      
REVENUES
   Product sales and rental income                                      $    970,109        $    319,378       $    514,584
   Research grant and milestone revenue                                           --          22,312,498          1,983,336
   Research revenue earned under collaborative agreement                          --           2,851,362          2,892,816
                                                                        ------------        ------------       ------------
TOTAL REVENUES                                                               970,109          25,483,238          5,390,736
                                                                        ------------        ------------       ------------

OPERATING COSTS
   Cost of product sales and royalties                                     3,481,248           5,253,424          2,148,994
   Research and development                                                5,403,961          12,121,606         10,789,906
   Marketing and sales                                                     2,494,405                  --                 --
   General and administrative                                              6,343,680           5,591,039          3,654,792
                                                                        ------------        ------------       ------------
TOTAL OPERATING COSTS                                                     17,723,294          22,966,069         16,593,692
                                                                        ------------        ------------       ------------
INCOME (LOSS) FROM OPERATIONS                                            (16,753,185)          2,517,169        (11,202,956)
                                                                        ------------        ------------       ------------

OTHER INCOME, NET
   Interest income, net                                                    1,926,331           2,745,143          3,753,019
   Realized gains on sales of United States government securities                 --             500,206             91,841
                                                                        ------------        ------------       ------------
TOTAL OTHER INCOME                                                         1,926,331           3,245,349          3,844,860
                                                                        ------------        ------------       ------------

NET INCOME (LOSS)                                                       $(14,826,854)       $  5,762,518       $ (7,358,096)
                                                                        ============        ============       ============

BASIC AND DILUTED NET INCOME (LOSS) PER COMMON SHARE                    $      (1.06)       $       0.42       $      (0.53)
                                                                        ============        ============       ============

WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING                      13,936,482          13,877,566         13,791,735
                                                                        ============        ============       ============



See the accompanying Notes to the Consolidated Financial Statements.


                                      F-3




DUSA PHARMACEUTICALS, INC.

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
--------------------------------------------------------------------------------



                                                             COMMON STOCK
                                                   --------------------------------    ADDITIONAL
                                                        NUMBER OF                         PAID-IN         ACCUMULATED
                                                           SHARES         AMOUNT          CAPITAL             DEFICIT
                                                   ---------------  --------------- --------------  ------------------
                                                                                        
BALANCE, JANUARY 1, 2001                               13,730,890      $94,757,532     $1,860,519       $(42,487,349)
                                                   ---------------  --------------- --------------  ------------------
Comprehensive loss:
   Net loss for period                                                                                    (7,358,096)
   Net   unrealized   gain  on   United   States
      government  securities  available for sale
      (net of realized gains of $91,841)

Total comprehensive loss
Issuance of common stock to consultants                     5,000           54,750
Exercises of options                                      104,500          478,279
Exercises of warrants                                      25,000          150,000
Stock based compensation                                                                  155,067
                                                   ---------------  --------------- --------------  ------------------
BALANCE, DECEMBER 31, 2001                             13,865,390      $95,440,561     $2,015,586       $(49,845,445)
                                                   ---------------  --------------- --------------  ------------------

Comprehensive income:
   Net income for period                                                                                    5,762,518
   Net   unrealized   gain  on   United   States
      government  securities  available for sale
      (net of realized gains of $500,206)

Total comprehensive income
Issuance of common stock to consultants                    22,222           50,000
                                                   ---------------  --------------- --------------  ------------------
BALANCE, DECEMBER 31, 2002                             13,887,612      $95,490,561     $2,015,586       $(44,082,927)
                                                   ---------------  --------------- --------------  ------------------

Comprehensive income:
   Net loss for period                                                                                   (14,826,854)
   Net   unrealized   loss  on   United   States
      government securities available for sale

Total comprehensive loss
Issuance of common stock to consultants                    44,416          110,000
Exercises of options                                       11,000           32,870
Issuance of common stock to employee                       23,219           37,123
                                                   ---------------  --------------- --------------  ------------------
BALANCE, DECEMBER 31, 2003                             13,966,247      $95,670,554     $2,015,586       $(58,909,781)
                                                   ===============  =============== ==============  ==================




                                                         ACCUMULATED
                                                               OTHER
                                                       COMPREHENSIVE
                                                              INCOME           TOTAL
                                                   ------------------- -----------------
                                                                 

BALANCE, JANUARY 1, 2001                                   $1,179,094       $55,309,796
                                                   ------------------- -----------------
Comprehensive loss:
   Net loss for period                                                      (7,358,096)
   Net   unrealized   gain  on   United   States
      government  securities  available for sale
      (net of realized gains of $91,841)                    1,044,741         1,044,741
                                                                       -----------------
Total comprehensive loss                                                    (6,313,355)
Issuance of common stock to consultants                                          54,750
Exercises of options                                                            478,279
Exercises of warrants                                                           150,000
Stock based compensation                                                        155,067
                                                   ------------------- -----------------
BALANCE, DECEMBER 31, 2001                                 $2,223,835       $49,834,537
                                                   ------------------- -----------------

Comprehensive income:
   Net income for period                                                      5,762,518
   Net   unrealized   gain  on   United   States
      government  securities  available for sale
      (net of realized gains of $500,206)                     410,675           410,675
                                                                       -----------------
Total comprehensive income                                                    6,173,193
Issuance of common stock to consultants                                          50,000
                                                   ------------------- -----------------
BALANCE, DECEMBER 31, 2002                                 $2,634,510       $56,057,730
                                                   ------------------- -----------------

Comprehensive income:
   Net loss for period                                                     (14,826,854)
   Net   unrealized   loss  on   United   States
      government securities available for sale            (1,178,820)       (1,178,820)
                                                                       -----------------
Total comprehensive loss                                                   (16,005,674)
Issuance of common stock to consultants                                         110,000
Exercises of options                                                             32,870
Issuance of common stock to employee                                             37,123
                                                   ------------------- -----------------
BALANCE, DECEMBER 31, 2003                                 $1,455,690       $40,232,049
                                                   =================== =================


See the accompanying Notes to the Consolidated Financial Statements.


                                      F-4



DUSA PHARMACEUTICALS, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
--------------------------------------------------------------------------------



                                                                               YEAR ENDED DECEMBER 31,
                                                                  ----------------------------------------------
                                                                          2003             2002             2001
                                                                  ------------     ------------     ------------
                                                                                           
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES
   Net income (loss)                                              $(14,826,854)    $  5,762,518     $ (7,358,096)
   Adjustments to reconcile net income (loss) to net cash used
    in operating activities
      Amortization  of premiums and accretion of discounts on
       United States government securities available for sale
       and investment securities, net                                  100,346         (378,089)         738,699
      Depreciation and amortization                                  1,610,848        3,247,129        1,066,915
      Amortization of deferred revenue                                      --      (22,312,498)      (1,983,336)
      Stock based compensation                                              --               --          155,067
      Issuance of common stock to consultants                          110,000           50,000           54,750
   Changes in other assets and liabilities impacting cash
     flows from operations:
      Accrued interest receivable                                      165,868          223,795           66,624
      Accounts receivable                                             (192,763)          84,560          793,679
      Receivable under co-development program                               --          864,534         (141,964)
      Inventory                                                        475,828        1,144,421       (1,001,114)
      Prepaids and other current assets                                (84,709)        (424,779)        (190,608)
      Deferred charges                                                      --         (100,000)        (400,000)
      Accounts payable                                                 306,391          238,002          214,389
      Accrued payroll and other accrued expenses                      (550,872)          84,477          585,224
      Deferred revenue                                                 124,800         (268,258)        (235,849)
      Restricted cash                                                   (1,330)          (1,865)        (136,018)
                                                                  ------------     ------------     ------------
NET CASH USED IN OPERATING ACTIVITIES                              (12,762,447)     (11,786,053)      (7,771,638)
                                                                  ------------     ------------     ------------

CASH FLOWS PROVIDED BY (USED IN) INVESTING ACTIVITIES
   Purchases of United States government securities                 (4,000,000)      (6,131,356)     (23,282,378)
   Proceeds from maturing and sales of United States
     government securities                                          15,000,000       18,246,298       24,502,758
   Additions of property, plant and equipment                         (632,654)      (2,622,158)      (2,833,653)
   Deposits on equipment                                                    --               --           98,000
   Payments to licensor                                                     --               --         (350,000)
                                                                  ------------     ------------     ------------

NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES                 10,367,346        9,492,784       (1,865,273)
                                                                  ------------     ------------     ------------

CASH FLOWS PROVIDED BY (USED IN) FINANCING ACTIVITIES
   Proceeds from long-term debt                                             --        1,900,000               --
   Payment of long-term debt                                          (270,000)        (112,500)              --
   Proceeds from exercise of options                                    32,870               --          628,279
                                                                  ------------     ------------     ------------

NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES                   (237,130)       1,787,500          628,279
                                                                  ------------     ------------     ------------

NET DECREASE IN CASH AND CASH EQUIVALENTS                           (2,632,231)        (505,769)      (9,008,632)

CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR                       6,926,713        7,432,482       16,441,114
                                                                  ------------     ------------     ------------

CASH AND CASH EQUIVALENTS AT END OF YEAR                          $  4,294,482     $  6,926,713     $  7,432,482
                                                                  ============     ============     ============

                                                                  ------------     ------------     ------------
   Cash paid for interest                                         $     58,623     $     41,066     $         --
                                                                  ============     ============     ============



During 2003,  the Company  issued 23,219 shares of restricted  common stock at a
closing  price of $1.599 per share to its Chief  Executive  Officer,  reflecting
payment  of the  after-tax  portion of his 2002  bonus  compensation,  which was
accrued at December 31, 2002.

See the accompanying Notes to the Consolidated Financial Statements.


                                      F-5



1)    NATURE OF BUSINESS

      DUSA  Pharmaceuticals,  Inc. (the "Company" or "DUSA") was  established to
      develop prescription pharmaceutical products for all markets, primarily in
      the field of photodynamic therapy ("PDT") and photodetection ("PD"), which
      combines the use of a  pharmaceutical  product  with  exposure to light to
      induce a therapeutic or detection effect. The Company has concentrated its
      initial  efforts on topical and/or local uses of  aminolevulinic  acid HCl
      ("Levulan(R)")  PDT/PD. The Company's  currently marketed products include
      the Levulan(R)  Kerastick(R)  20% Topical  Solution and the BLU-U(R) brand
      light source for the treatment of actinic  keratoses  (AKs) of the face or
      scalp.  The Company  also  markets the  BLU-U(R)  without  Levulan for the
      treatment of moderate inflammatory acne vulgaris.

2)    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

      A) PRINCIPLES OF  CONSOLIDATION  - The  Company's  consolidated  financial
      statements  include  the  accounts  of the  Company  and its  wholly-owned
      subsidiary, DUSA Pharmaceuticals New York, Inc., which was formed on March
      3, 1994 to be the research  and  development  center for the Company.  All
      intercompany balances and transactions have been eliminated.

      B) BASIS OF PRESENTATION AND USE OF ESTIMATES - These financial statements
      have been  prepared in conformity  with  accounting  principles  generally
      accepted  in  the  United  States  of  America.  Such  principles  require
      management  to make  estimates  and  assumptions  that affect the reported
      amounts of assets and liabilities and disclosure of contingent  assets and
      liabilities  at the  date of the  financial  statements  and the  reported
      amounts of revenues  and  expenses  during the  reporting  period.  Actual
      results could differ from those estimates.

      C)  RECLASSIFICATIONS  - Certain prior year amounts have been reclassified
      to conform to the current year presentation. Such reclassifications had no
      impact on the net  income  (loss) or  shareholders'  equity for any period
      presented.

      D) CASH AND CASH EQUIVALENTS - Cash equivalents  include short-term highly
      liquid investments  purchased with original maturities of 90 days or less.
      In  December   2001,  the  Company   executed  a  short-term,   renewable,
      irrevocable and  unconditional  letter of credit for $136,018 in lieu of a
      security  deposit  for  the  construction  of the  Company's  Kerastick(R)
      manufacturing facility at its Wilmington, Massachusetts location. The cash
      is held in a separate bank account and is recorded in  restricted  cash in
      the  Consolidated  Balance  Sheets.  This  letter of credit was renewed in
      December 2003 and has a balance, including interest earned, of $139,213 at
      December 31, 2003.

      E) UNITED  STATES  GOVERNMENT  SECURITIES  - The  Company  classifies  all
      securities  as  available  for sale and records such  investments  at fair
      market value and records unrealized gains and losses on available for sale
      securities  as  a  separate  component  of  shareholders'   equity,  until
      realized.  The  premiums  and  discounts  recorded on the  purchase of the
      securities  are  amortized  into  interest  income  over  the  life of the
      securities.


                                      F-6



      As the Company's  United States  government  securities  are available for
      sale,  and as  management  expects to sell a portion of its United  States
      government securities in the next fiscal year in order to meet its working
      capital  requirements,  it has  classified  securities as current  assets,
      except for those pledged as collateral on the secured term loan promissory
      note.

      F)  INVENTORY  -  Inventory  is  stated  at the  lower of cost  (first-in,
      first-out method) or market.  Inventory  consisting of BLU-U(R) commercial
      light sources is  reclassified  to property,  plant and equipment when the
      BLU-U(R) is shipped to physicians  for use under  demonstration  programs,
      and depreciated  over their estimated useful lives.  Inventory  identified
      for research and development activities is expensed in the period in which
      that inventory is designated for such use.

      G)  PROPERTY,  PLANT AND  EQUIPMENT - Property,  plant and  equipment  are
      carried at cost less accumulated depreciation. Depreciation is computed on
      a  straight-line  basis over the  estimated  lives of the related  assets.
      Leasehold improvements are amortized over the lesser of their useful lives
      or the lease terms.

      H) IMPAIRMENT OF LONG-LIVED  ASSETS - The Company  reviews its  long-lived
      assets for impairment whenever events or changes in circumstances indicate
      that the  carrying  amount of a long-lived  asset may not be  recoverable.
      Recoverability  of assets to be held and used is measured by a  comparison
      of the carrying amount of an asset to future net cash flows expected to be
      generated by the asset. If such assets are considered to be impaired,  the
      impairment  to be  recognized  is  measured  by the  amount  by which  the
      carrying  amount of the assets exceeds the fair value of the assets.  When
      it is determined  that the carrying  value of  long-lived  or  intangibles
      assets may not be  recoverable  based upon the existence of one or more of
      the above  indicators  of  impairment,  the asset is  written  down to its
      estimated fair value on a discounted cash flow basis.

      I) REVENUE  RECOGNITION  - Revenues on product sales are  recognized  when
      persuasive  evidence  of an  arrangement  exists,  the  price is fixed and
      final,  delivery  has  occurred  to  end-users,  and  there is  reasonable
      assurance of  collection.  Research  revenue  earned  under  collaborative
      agreements  consisted of non-refundable  research and development  funding
      from a corporate  partner.  Research  revenue  generally  compensated  the
      Company for a portion of agreed-upon research and development expenses and
      was  recognized  as  revenue  at the time  the  research  and  development
      activities  were performed  under the terms of the related  agreements and
      when  no  future  performance  obligations  existed.  Milestone  or  other
      up-front  payments are  recorded as deferred  revenue upon receipt and are
      recognized  as  income  on a  straight-line  basis  over  the  term of the
      agreement.

      In December  2002,  the EITF reached  conclusion  on EITF Issue No. 00-21,
      "Accounting for Revenue  Arrangements  with Multiple  Deliverables."  This
      consensus provides guidance in determining when a revenue arrangement with
      multiple deliverables should be divided into separate units of accounting,
      and, if  separation  is  appropriate,  how the  arrangement  consideration
      should be allocated to the identified  accounting units. The provisions of
      EITF No.  00-21 are  effective  for revenue  arrangements  entered into in
      fiscal periods  beginning  after June 15, 2003.  The Company  adopted EITF
      00-21 on June 1, 2003 and the  adoption  had no  impact  on the  Company's
      financial  position or results of  operations.  In December  2003, the SEC
      released Staff  Accounting  Bulletin No. 104,  Revenue  Recognition  ("SAB
      104").  SAB  104  clarifies   existing  guidance  regarding  revenues  for
      contracts which contain  multiple  deliverables to make it consistent with
      EITF No. 00-21.  The adoption of SAB 104 did not have a material effect on
      the Company's financial position or results of operations.


                                      F-7



      J)  RESEARCH  AND  DEVELOPMENT  COSTS - Costs  related  to the  conceptual
      formulation  and design of products and processes are expensed as research
      and  development  costs  as  they  are  incurred.   Purchased  technology,
      including  the costs of  licensed  technology  for a  particular  research
      project that do not have alternative future uses, are expensed at the time
      the costs are incurred.

      K) INCOME TAXES - The Company  recognizes  deferred  income tax assets and
      liabilities for the expected future tax  consequences for events that have
      been  included  in the  Company's  financial  statements  or tax  returns.
      Deferred tax assets and  liabilities  are based on the difference  between
      the financial  statement and tax bases of assets and liabilities using tax
      rates expected to be in effect in the years in which these differences are
      expected  to  reverse.  A  valuation  allowance  is provided to reduce the
      deferred  tax  assets to the  amount  that will  more  likely  than not be
      realized.

      L) BASIC AND DILUTED NET INCOME (LOSS) PER SHARE - Basic net income (loss)
      per  common  share is based  on the  weighted  average  number  of  shares
      outstanding  during  each  period.  Stock  options  and  warrants  are not
      included  in the  computation  of the  weighted  average  number of shares
      outstanding for dilutive net income (loss) per common share during each of
      the periods presented in the Statement of Operations,  as the effect would
      be  antidilutive.  For the years ended December 31, 2003,  2002, and 2001,
      stock options and warrants totaling  approximately  2,745,000,  2,553,000,
      and  2,548,000   shares,   respectively,   have  been  excluded  from  the
      computation of diluted net income (loss) per share.

      M) STOCK-BASED  COMPENSATION - SFAS No. 123,  "Accounting  for Stock-Based
      Compensation,"  as amended by SFAS No. 148,  "Accounting  for  Stock-Based
      Compensation,   Transition  and   Disclosure,"   addresses  the  financial
      accounting  and  reporting  standards  for  stock  or  other  equity-based
      compensation arrangements.  The Company has elected to continue to use the
      intrinsic  value-based  method to account for employee stock option awards
      under the  provisions  of  Accounting  Principles  Board  Opinion  No. 25,
      "Accounting  for Stock Issued to  Employees,"  and to provide  disclosures
      based on the fair value method in the Notes to the Consolidated  Financial
      Statements as permitted by SFAS No. 123, as amended by SFAS No. 148. Under
      the intrinsic value method,  compensation  expense,  if any, is recognized
      for the  difference  between  the strike  price of the option and the fair
      value  of the  underlying  common  stock  as of a  measurement  date.  The
      measurement date is the time when both the number of shares and the strike
      price is known. Stock or other equity-based compensation for non-employees
      must be  accounted  for under the fair  value-based  method as required by
      SFAS No. 123, as amended by SFAS No. 148, and  Emerging  Issues Task Force
      ("EITF") No. 96-18,  "Accounting for Equity Instruments That Are Issued to
      Other Than Employees for Acquiring,  or in Conjunction with Selling, Goods
      or Services" and other  related  interpretations.  Under this method,  the
      equity-based  instrument  is  valued  at  either  the  fair  value  of the
      consideration  received or the equity instrument issued on the measurement
      date, which is generally the grant date. The resulting  compensation  cost
      is recognized and charged to operations over the service period,  which is
      generally the vesting period.


                                      F-8



      As described above, the Company uses the intrinsic value method to measure
      compensation expense associated with grants of stock options to employees.
      Had the Company  used the fair value method to measure  compensation,  the
      net income (loss) and net income (loss) per share would have been reported
      as follows:



                                                                         2003                   2002                   2001
                                                               --------------         --------------         --------------
                                                                                                    
     NET INCOME (LOSS)
          As reported                                          ($  14,826,854)        $    5,762,518         ($   7,358,096)
          Effect on net income (loss) if fair value
          method had been used                                     (3,445,951)            (3,880,231)            (5,635,208)
                                                               --------------         --------------         --------------
          Proforma                                             ($  18,272,805)        $    1,882,287         ($  12,993,304)
                                                               ==============         ==============         ==============

     BASIC AND DILUTED NET INCOME (LOSS) PER COMMON SHARE
          As reported                                          ($        1.06)        $         0.42         ($        0.53)
          Effect on net income (loss) per common share
          if fair value method had been used                            (0.25)                 (0.28)                 (0.41)
                                                               --------------         --------------         --------------
          Proforma                                             ($        1.31)        $         0.14         ($        0.94)
                                                               ==============         ==============         ==============


      The fair value of the options at the date of grant was estimated using the
      Black-Scholes model with the following weighted average assumptions:


                                          2003            2002            2001
                                          ----            ----            ----
        Expected life (years)                5               7               7
        Risk free interest rate           3.02%           4.89%           4.88%
        Expected volatility              80.85%          72.84%          70.87%
        Dividend yield                      --              --              --


      Using these assumptions,  the  weighted-average  fair value per option for
      the years ended December 31, 2003,  2002, and 2001, was $1.57,  $2.53, and
      $10.29, respectively.

      N) COMPREHENSIVE  INCOME - The Company has reported  comprehensive  income
      (loss)  and  its  components  as  part of its  Consolidated  Statement  of
      Shareholders' Equity.  Comprehensive income, apart from net income (loss),
      relates  to net  unrealized  gains or losses on United  States  government
      securities.


                                      F-9



      O) SEGMENT  REPORTING - The  Company  presently  operates in one  segment,
      which is the development and  commercialization  of emerging  technologies
      that use drugs in combination with light to treat and detect disease.

      P) FAIR  VALUE  OF  FINANCIAL  INSTRUMENTS  - The  carrying  value  of the
      Company's  financial assets and liabilities  approximate their fair values
      due to  their  short-term  nature.  Marketable  securities  classified  as
      available for sale are carried at fair market value. The fair market value
      of the  Company's  long-term  debt is currently  based on a floating  rate
      based on LIBOR and, accordingly,  the carrying value approximates its fair
      market value.

      Q)  CONCENTRATION  OF CREDIT RISK - The Company invests cash in accordance
      with a policy  objective  that seeks to preserve both liquidity and safety
      of  principal.  The Company is subject to credit risk  through  short-term
      investments  and  mitigates  this  risk  by  investing  in  United  States
      government  securities.  The  Company  is exposed  to  concentration  risk
      related  to  accounts  receivable  that is  primarily  generated  from its
      distributors.

      R) RECENTLY ISSUED ACCOUNTING  GUIDANCE - In January 2003, the FASB issued
      Interpretation No. 46,  "Consolidation of Variable Interest  Entities,  an
      interpretation  of ARB No. 51" ("FIN  46"),  which was  amended by FIN 46R
      issued in  December  2003.  This  interpretation  of  Accounting  Research
      Bulletin  No.  51,  "Consolidated   Financial   Statements,   "  addresses
      consolidation by business enterprises of variable interest entities (VIEs)
      that  either:  (1) do not have  sufficient  equity  investment  at risk to
      permit  the  entity  to  finance   its   activities   without   additional
      subordinated financial support, or (2) for which the equity investors lack
      an essential  characteristic  of a controlling  financial  interest.  This
      Interpretation applies immediately to VIEs created after January 31, 2003.
      It also  applies in the first fiscal year or interim  period  ending after
      March  15,  2004,  to VIEs  created  before  February  1, 2003 in which an
      enterprise holds a variable interest.  FIN 46 requires  disclosure of VIEs
      in financial statements issued after January 31, 2003, if it is reasonably
      possible  that as of the  transition  date:  (1) the  company  will be the
      primary beneficiary of an existing VIE that will require consolidation or,
      (2) the company  will hold a  significant  variable  interest  in, or have
      significant  involvement  with,  an existing  VIE. The Company has adopted
      this statement which had no effect on its financial position or results of
      operations.

3)    2002 DERMATOLOGY COLLABORATION TERMINATION

      On September 1, 2002, DUSA and Schering AG, the Company's former marketing
      and  development  partner for Levulan(R) PDT in the field of  dermatology,
      terminated the parties' Marketing Development and Supply Agreement,  dated
      November 22, 1999. As a result of this  termination,  DUSA  reacquired all
      rights it  granted  to  Schering  AG under the  agreement,  and  evaluated
      certain items on its Consolidated  Balance Sheet for the timing of revenue
      recognition  and potential  impairment.  These items included  unamortized
      deferred revenue related to non-refundable  milestone payments  previously
      received  under the agreement  with Schering AG, and assets  including the
      Company's   manufacturing   facility,  raw  material  and  finished  goods
      inventories,  commercial  light units, and deferred charges and royalties.
      As a result of this analysis,  in addition to normal amortization recorded
      prior  to the  termination  of the  Schering  AG  agreement,  the  Company
      recorded the  following  items in its  financial  statements  for the year
      ended December 31, 2002:


                                      F-10





                                                                                                                REVENUE
                                                                                                           RECOGNITION/
                 STATEMENT OF OPERATIONS ITEM                    BALANCE SHEET ITEM                    ASSET IMPAIRMENT
            --------------------------------------------    -------------------------------------  ---------------------
                                                                                                 
               Revenues:
               ---------
               Research grant and milestone revenue            Deferred revenue (1)                         $20,990,000
                                                                                                   ---------------------

               Operating Costs:
               ----------------
               Cost of product sales                           Deferred charges (2)                            $543,000
                                                               Inventory (3)                                  1,705,000
                                                               Commercial light sources under
                                                                 lease or rental  (4)                           390,000
                                                                                                   ---------------------
               Total cost of product sales                                                                   $2,638,000

               Research and development costs                  Deferred royalty  (2)                            639,000
                                                                                                   ---------------------
                 Total operating cost charges                                                                $3,277,000
                                                                                                   ---------------------



      1)    In 2002, the Company  accelerated  the recognition of $20,990,000 of
            previously unamortized research grant and milestone revenue received
            from  Schering  AG,  which  were  previously  recorded  as  deferred
            revenue.

      2)    In 2002,  the Company  charged (i) $509,000 to cost of product sales
            and  royalties  for  deferred  charges  associated  with its amended
            Supply Agreement with Sochinaz SA, the manufacturer of the bulk drug
            ingredient used in Levulan(R), (ii) $34,000 to cost of product sales
            and royalties for deferred charges associated with  underutilization
            costs  paid  to  National  Biological   Corporation   ("NBC"),   the
            manufacturer  of the  Company's  BLU-U(R),  and  (iii)  $639,000  to
            research and  development  costs for deferred  royalties  associated
            with  payments to PARTEQ,  the  Company's  licensor.  These  amounts
            represented  the unamortized  balances of previously  deferred costs
            which  were  being   amortized  over  periods   ranging  from  1  to
            12 1/2 years.

      3)    In 2002, the Company  recorded  lower of cost or market  adjustments
            for estimated excess BLU-U(R) inventory of $1,594,000,  and $111,000
            for bulk  Levulan(R)  based on (i) the  termination of the Company's
            former dermatology collaboration  arrangement,  (ii) limited product
            sales  since  the  September  2000  product  launch,  and  (iii) the
            Company's  expectation  of no  significant  near-term  increases  in
            Kerastick(R) sales levels and/or BLU-U(R) placements.

      4)    In 2002, the Company recorded an additional $390,000 of depreciation
            expense  reflecting a shortened  useful life of its  BLU-U(R)  units
            under lease,  rental, or trial  arrangements to reflect a three-year
            asset life. This accelerated depreciation policy was attributable to
            the low level of BLU-U(R) placements to date, the termination of the
            collaboration   arrangement,   and  management's  expectations  that
            near-term placements would be limited.

4)    UNITED STATES GOVERNMENT SECURITIES

      Securities  available  for sale consist of United States  Treasury  Bills,
      Notes, and other United States  government  securities with yields ranging
      from 3.65% to 7.36% and  maturity  dates  ranging from January 15, 2004 to
      September 24, 2007.  Securities  pledged as collateral on the secured term
      loan promissory note have been classified as non-current  assets. The fair
      market  value and cost  basis of such  securities  were as  follows  as of
      December 31:


                                      F-11



                                               2003               2002
                                        -----------        -----------
          Fair market value             $33,535,781        $45,814,947
          Cost basis                     32,080,091         43,180,437
                                        -----------        -----------
          Gross unrealized gains        $ 1,455,690        $ 2,634,510
                                        ===========        ===========

      The change in net unrealized  gains on such securities for the years ended
      December  31,  2003,  2002  and  2001  was   ($1,178,820),   $410,675  and
      $1,044,741,  respectively,  and has been  recorded  in  accumulated  other
      comprehensive income, which is reported as part of shareholders' equity in
      the Consolidated Balance Sheets.

5)    INVENTORY

      Inventory consisted of the following at December 31:


                                              2003                2002
                                        ----------          ----------
          Finished goods                $  582,382          $1,047,941
          Raw materials                    130,449             140,718
                                        ----------          ----------
                                        $  712,831          $1,188,659
                                        ==========          ==========


6)    PROPERTY, PLANT AND EQUIPMENT

      Property,  plant and  equipment,  at cost,  consisted of the  following at
      December 31:





                                                            USEFUL LIVES
                                                                  (YEARS)                    2003                     2002
                                                           --------------              ----------               ----------
                                                                                                       
Computer equipment and software                                         3              $1,971,114               $1,856,540

BLU-U(R)units in physicians' offices                                    3               1,187,875                  945,436

Furniture, fixtures and equipment                                       5                 542,496                  523,831

Manufacturing equipment                                                 5               2,096,433                1,447,087

Manufacturing facility                                      Term of lease               2,204,122                        -

Leasehold improvements                                      Term of lease                 666,344                  666,344

Construction work-in-progress                                          --                      --                2,596,492
                                                                                       ----------               ----------
                                                                                        8,668,384                8,035,730

                Accumulated depreciation and amortization                             (4,416,895)              (2,806,047)
                                                                                       ----------               ----------
                                                                                       $4,251,489               $5,229,683
                                                                                       ==========               ==========



      In July 2003,  the  Company  received  FDA  approval  to  manufacture  the
      Levulan(R) Kerastick(R) at its manufacturing facility and accordingly, the
      Company  began  to  depreciate  the  facility  and  related  manufacturing
      equipment  over  their  estimated   useful  lives.   The  Company's  lease
      commitment for office space and the manufacturing  facility in Wilmington,
      MA extends through November 2016.


                                      F-12



      Depreciation and amortization totaled $1,611,000, $1,541,000, and $716,000
      for 2003,  2002,  and 2001,  respectively.  Accumulated  depreciation  and
      amortization includes $1,016,000 and $473,000 of accumulated  depreciation
      at December  31, 2003 and 2002,  respectively,  associated  with  BLU-U(R)
      units in  physicians'  offices,  which have been  transferred to property,
      plant and  equipment  from  inventory  as these  units  were  provided  to
      physicians through former marketing trial programs.

      During 2003 and 2002, the Company incurred interest expense of $56,000 and
      $47,000,  respectively,  on borrowings associated with the construction of
      our new Kerastick(R) manufacturing facility. Of these amounts, $36,000 and
      $47,000 has been  currently  capitalized  in property and equipment in the
      Consolidated Balance Sheet in 2003 and in 2002, respectively.

7)    OTHER ACCRUED EXPENSES

      Other accrued expenses consisted of the following at December 31:




                                                               2003              2002
                                                           ----------        ----------
                                                                       
          Accrued research and development costs           $  184,912        $  473,543
          Accrued marketing and sales costs                   113,020                --
          Accrued product related costs                       144,826           463,340
          Accrued license milestone (1)                            --           500,000
          Accrued legal and other professional fees           359,747           297,966
          Accrued employee benefits                           189,051           207,833
          Other accrued expenses                              170,583           127,468
                                                           ----------        ----------
                                                           $1,162,139        $2,070,150
                                                           ==========        ==========


      (1) Accrued  license  milestone at December 31, 2002 represents a one-time
      $500,000  milestone  payment under the Company's  license  agreement  with
      Photonamic  GmbH & Co. KG,  which  provided  the Company with a license to
      certain  proprietary  technology  related  to ALA for use in the  field of
      brain cancer (see Note 15(e)).

8)    LONG-TERM DEBT

      Long-term debt consisted of the following at December 31:




                                                          2003                2002
                                                   -----------         -----------
                                                                 
          Secured term loan promissory note        $ 1,517,500         $ 1,787,500
          Less: Current maturities                    (270,000)           (270,000)
                                                   -----------         -----------
                                                   $ 1,247,500         $ 1,517,500
                                                   ===========         ===========



      In May 2002,  DUSA  entered  into a  secured  term  loan  promissory  note
      ("Note") with Citizens Bank of  Massachusetts  to fund the construction of
      its  manufacturing  facility and borrowed  $1,900,000.  The Note currently
      bears  interest at a 360-day  LIBOR-based  rate of 2.755% through June 30,
      2004.  Based on the terms of the Note,  at June 30th of each year DUSA can
      either  continue  to choose a  LIBOR-based  rate at that  time,  execute a
      one-time  conversion  to a fixed  rate  loan,  or repay the loan  balance.
      Approximately   $3,000,000  of  the  Company's  United  States  government
      securities  are pledged as collateral to secure the loan. The terms of the
      Note require monthly  principal and interest payments through its maturity
      in June 2009,  unless the  Company  repays the loan  balance at the annual
      renewal date. Annual principal payments due under the Note are as follows:



                                      F-13


                                                       PRINCIPAL PAYMENTS
                                                       ------------------

                  2004                                           $270,000
                  2005                                            270,000
                  2006                                            270,000
                  2007                                            270,000
                  2008                                            270,000
                  Beyond 2008                                     167,500
                                                       -------------------
                                                               $1,517,500
                                                       ===================


9)    DEFERRED REVENUE

      DUSA engages  national  distributors and marketers of medical and surgical
      supplies to act as third-party distributors of the Levulan(R) Kerastick(R)
      in the United  States.  The  Company  has  recorded  deferred  revenue for
      Kerastick(R)  units  that have been sold to the  distributors  but not yet
      sold to  end-users  as the  price  was not  fixed  and  final,  since  the
      distributors  have a right  of  return  on  Kerastick(R)  units.  Deferred
      revenue  at  December   31,  2003  and  2002  was   $129,900  and  $5,100,
      respectively.

10)   MARKETING AND SALES

      As a result of the termination of the Company's  marketing and development
      collaboration  with its former  marketing  partner in September  2002, the
      Company   commenced  certain  marketing  and  sales  initiatives  in  2003
      associated with having full rights and  responsibilities  for its product.
      In addition,  the Company has reassigned  personnel and related costs that
      were  previously  functioning  in research  and  development  roles to its
      marketing and sales  function.  Prior to the Company's  termination of its
      marketing  and  development  collaboration,   all  rights  and  activities
      associated  with marketing and sales of its approved  products were solely
      the responsibility of its former partner. Activities included in marketing
      and sales  expense for 2003 consist of trade show  expenses,  advertising,
      personnel and other resources  assigned to marketing and sales activities,
      and  other  marketing  and  promotional  activities.  All such  costs  are
      expensed as incurred.


                                      F-14



11)   INCOME TAXES

      The tax effect of significant temporary differences  representing deferred
      tax assets and liabilities at December 31:





                                                                        2003                 2002
                                                                ------------         ------------
                                                                               
DEFERRED TAX ASSETS
     Deferred revenue                                           $     52,000         $      2,000
     Intangible assets                                               592,000              588,000
     Accrued charges                                                  41,000               46,000
     Research and development tax credits carryforwards            2,354,000            2,144,000
     Operating loss carryforwards                                 23,321,000           18,253,000
     Capital loss and charitable contribution carryforwards            5,000                5,000
     Deferred charges                                                     --              405,000
     License fee                                                     181,000              202,000
     Reserves                                                        944,000              823,000
                                                                ------------         ------------
     Total deferred tax assets                                    27,490,000           22,468,000
                                                                ------------         ------------

DEFERRED TAX LIABILITIES
     Fixed assets                                                     (8,000)              (8,000)
                                                                ------------         ------------
          Total deferred tax liabilities                              (8,000)              (8,000)
                                                                ------------         ------------
     Net deferred tax assets before allowance                     27,482,000           22,460,000
     Valuation allowance                                         (27,482,000)         (22,460,000)
                                                                ------------         ------------
          Total deferred tax asset                              $         --         $         --
                                                                ============         ============



      During the years ended  December 31, 2003,  2002,  and 2001, the valuation
      allowance  was  increased  by  approximately  $5,022,000,   $191,000,  and
      $4,372,000,  respectively, due to the uncertainty of future realization of
      the net deferred tax assets.

      Included  in  deferred  tax  assets  at  December  31,  2003  and  2002 is
      $1,600,000 in both years of future benefits  which,  if realized,  will be
      credited to additional paid in capital rather than results of operations.


                                      F-15




      As of December  31,  2003,  the Company  has  Federal net  operating  loss
      carryforwards  for tax purposes of approximately  $59,531,000 and research
      and development tax credits of approximately $1,791,000, both of which, if
      not utilized, will expire for Federal tax purposes as follows:



                                                                      RESEARCH AND
                                               OPERATING LOSS              CREDITS
                                                CARRYFORWARDS      DEVELOPMENT TAX
                                               --------------      ---------------
                                                             
                                      2006        $        --        $     7,000
                                      2007                 --             57,000
                                      2008                 --             66,000
                                      2009                 --             84,000
                                      2010                 --             44,000
                                      2011          2,325,000            102,000
                                      2012          6,638,000            235,000
                                      2013          6,841,000                 --
                                      2018          5,738,000            145,000
                                      2019              1,000             81,000
                                      2020             28,000            159,000
                                      2021          8,934,000            284,000
                                      2022         14,620,000            341,000
                                      2023         14,406,000            186,000
                                                  -----------        -----------
                                                  $59,531,000        $ 1,791,000
                                                  ===========        ===========



      A reconciliation  between the effective tax rate and the statutory Federal
rate is as follows:



                                                                      2003                      2002                       2001
                                                    ----------------------     ---------------------      ---------------------
                                                             $          %               $          %               $          %
                                                    ----------------------     ---------------------      ---------------------
                                                                                                        
Income tax expense (benefit) at statutory rates     (5,041,000)     (34.0)      1,959,000       34.0      (2,502,000)     (34.0)
State taxes                                           (930,000)      (6.3)        371,000        6.4        (500,000)      (6.8)
Tax credit carryforwards                              (329,000)      (2.2)       (603,000)     (10.5)       (335,000)      (4.6)
Change in valuation allowance including
     revisions of prior year estimates               6,268,000       42.3      (1,737,000)     (30.1)      3,265,000       44.4
Other                                                   32,000        0.2          10,000        0.2          72,000        1.0
                                                    ----------       ----      ----------      -----      ----------       ----
                                                            --        --               --        --               --         --
                                                    ==========       ====      ==========      =====      ==========       ====



12)   SHAREHOLDERS' EQUITY

      COMMON  STOCK   ISSUANCES  -  On  June  15,  2003,  the  Company   granted
      compensation of $50,000 to Therapeutics, Inc. ("Therapeutics"), a clinical
      research  organization,  pursuant  to  an  agreement  for  services.  This
      compensation was issued in July 2003 and was comprised of 11,666 shares of
      common stock valued at $35,000 and $15,000 of cash. On June 15, 2002,  the
      Company granted 22,222 shares of unregistered  common stock pursuant to an
      agreement  for  services,  to  Therapeutics.  These  shares were valued at
      $50,000 at the time of grant.  On October 4,  2001,  the  Company  granted
      5,000 shares of unregistered  common stock to  Therapeutics  for services.
      These  shares were valued at  approximately  $55,000 at the time of grant.
      Each of these  transactions  was  recorded  in  research  and  development
      expense in the Consolidated Statements of Operations.


                                      F-16



      On  May 2,  2003,  the  Company  granted  a  total  of  32,750  shares  of
      unregistered  common stock to two outside  consultants as compensation for
      services rendered.  These shares were valued at approximately  $75,000 and
      recorded as part of research  and  development  costs in the  Consolidated
      Statements of Operations.

      On March 13, 2003, the Company  issued 23,219 shares of restricted  common
      stock at a  closing  price of  $1.599  per  share to its  Chief  Executive
      Officer,  reflecting  payment of the  after-tax  portion of his 2002 bonus
      compensation.  This  amount had been  accrued  in the  December  31,  2002
      financial statements.

      SHAREHOLDER  RIGHTS PLAN - On September  27, 2002,  the Company  adopted a
      shareholder  rights plan (the "Rights  Plan") at a special  meeting of the
      Board of Directors.  The Rights Plan provides for the  distribution of one
      right as a  dividend  for each  outstanding  share of common  stock of the
      Company to holders of record as of October 10, 2002.  Each right  entitles
      the  registered  holder  to  purchase  one  one-thousandths  of a share of
      preferred stock at an exercise price of $37.00 per right.  The rights will
      be  exercisable  subsequent  to the date that a person or group either has
      acquired,  obtained  the right to acquire,  or  commences  or discloses an
      intention  to  commence  a  tender  offer to  acquire,  15% or more of the
      Company's outstanding common stock (or 20% of the outstanding common stock
      in the case of a shareholder or group who  beneficially  held in excess of
      15% at the record  date),  or if a person or group is  declared an Adverse
      Person,  as such term is  defined in the  Rights  Plan.  The rights may be
      redeemed by the Company at a redemption  price of one  one-hundredth  of a
      cent per  right  until  ten days  following  the date the  person or group
      acquires, or discloses an intention to acquire, 15% or 20% or more, as the
      case may be, of the Company, or until such later date as may be determined
      by the Board.

      Under the Rights Plan, if a person or group acquires the threshold  amount
      of  common  stock,  all  holders  of  rights  (other  than  the  acquiring
      shareholder)  may,  upon  payment  of the  purchase  price then in effect,
      purchase shares of common stock of the Company having a value of twice the
      purchase  price.  In the event that the Company is involved in a merger or
      other similar transaction where it is not the surviving  corporation,  all
      holders  of  rights  (other  than  the  acquiring  shareholder)  shall  be
      entitled,  upon payment of the purchase price then in effect,  to purchase
      common  stock of the  surviving  corporation  having a value of twice  the
      purchase  price.  The rights  will  expire on  October  10,  2012,  unless
      previously  redeemed.  The Board has  adopted  certain  amendments  to the
      Company's  Certificate of  Incorporation  consistent with the terms of the
      Rights Plan.


                                      F-17



13)   STOCK OPTIONS AND WARRANTS

      A) 1996 OMNIBUS PLAN - The 1996 Omnibus Plan ("Omnibus Plan"), as amended,
      provides  for the granting of awards to purchase up to a maximum of 20% of
      the Company's  common stock  outstanding  or a maximum of  2,753,328.  The
      Omnibus Plan is administered by a committee  ("Committee")  established by
      the Board of  Directors.  The Omnibus Plan enables the  Committee to grant
      non-qualified  stock options  ("NQSO"),  incentive stock options  ("ISO"),
      stock   appreciation   rights,   restricted  stock,  or  other  securities
      determined by the Company, to directors, employees and consultants.

      NON-QUALIFIED STOCK OPTIONS - All the NQSOs granted under the Omnibus Plan
      have an  expiration  period  not  exceeding  ten years and are issued at a
      price  not less than the  market  value of the  common  stock on the grant
      date. NQSO grants to employees become exercisable at a rate of one quarter
      of the total  granted  on each of the  first,  second,  third  and  fourth
      anniversaries  of the grant  date,  subject  to  satisfaction  of  certain
      conditions  involving  continuous  periods of service.  In  addition,  the
      Company  initially  grants each individual who agrees to become a director
      15,000 NQSO to purchase  common  stock of the  Company.  Thereafter,  each
      director reelected at an Annual Meeting of Shareholders will automatically
      receive an additional 10,000 NQSO on June 30 of each year except for 2001,
      for which each director  received  5,000 NQSO based on an agreement at the
      June 14, 2001 shareholder meeting. Grants to directors immediately vest on
      the date of the grant.

      INCENTIVE  STOCK  OPTIONS - ISOs  granted  under the Omnibus  Plan have an
      expiration  period not exceeding ten years (five years for ISOs granted to
      employees who are also ten percent shareholders) and are issued at a price
      not less than the  market  value of the  common  stock on the grant  date.
      These  options  become  exercisable  at a rate of one quarter of the total
      granted on each of the first,  second,  third and fourth  anniversaries of
      the grant date,  subject to satisfaction of certain  conditions  involving
      continuous periods of service.


                                      F-18



      The  following  table  summarizes  information  about  all  stock  options
      outstanding at December 31, 2003:



                                                     OPTIONS OUTSTANDING                      OPTIONS  EXERCISABLE
                                  ---------------------------------------------------------------------------------------
                                                          WEIGHTED
                                          NUMBER           AVERAGE        WEIGHTED             NUMBER
                                  OUTSTANDING AT         REMAINING         AVERAGE     EXERCISABLE AT   WEIGHTED AVERAGE
                                        DECEMBER       CONTRACTUAL        EXERCISE           DECEMBER           EXERCISE
  RANGE OF EXERCISE PRICE               31, 2003              LIFE           PRICE           31, 2003              PRICE
  -----------------------         --------------       -----------        --------     --------------   ----------------
                                                                                         
  $1.60 to 3.63                          489,700        7.94 years           $2.51            196,700              $2.98
  3.87 to 7.71                           537,250        6.27 years            5.75            338,375               6.56
  7.75 to 9.33                           495,000        3.03 years            8.10            495,000               8.10
  9.69 to 26.19                          499,500        5.57 years           14.24            423,625              14.12
  27.19 to 31.00                         423,500        6.34 years           29.95            317,625              29.95
                                       ---------                          --------          ---------   ----------------
                                       2,444,950        5.82 years          $11.50          1,771,325              12.59
                                       =========                          ========          =========   ================



      Activity  under stock  option  plans  during the years ended  December 31,
      2003, 2002 and 2001 was as follows:




                                                             WEIGHTED                       WEIGHTED                       WEIGHTED
                                                              AVERAGE                        AVERAGE                        AVERAGE
                                                             EXERCISE                       EXERCISE                       EXERCISE
                                                 2003           PRICE           2002           PRICE           2001           PRICE
                                            ---------      ----------      ---------      ----------      ---------      ----------
                                                                                                       
Options outstanding, beginning of year      2,253,075      $    12.95      2,197,450      $    14.30      2,140,450      $    13.54

Options granted                               447,000            2.76        275,000            3.65        215,500           14.53

Options exercised                             (11,000)           2.99             --              --       (104,500)           5.95

Options cancelled                            (244,125)          11.21       (219,375)          14.67        (54,000)           7.66
                                            ---------      ----------      ---------      ----------      ---------      ----------

Options outstanding, end of year            2,444,950      $    11.50      2,253,075      $    12.95      2,197,450      $    14.30
                                            =========                      =========      ==========      =========      ==========

Options exercisable, end of year            1,771,325      $    12.59      1,666,826      $    11.75      1,364,700      $    10.97
                                            =========                      =========      ==========      =========      ==========



      Options that were granted during 2003,  2002 and 2001 have exercise prices
      ranging from $1.60 to $5.20 per share, $2.90 to $4.01 per share, and $8.05
      to $17.63 per share, respectively.

      Options which were  exercised  during 2003 and 2001 were  exercised at per
      share  prices   ranging   from  $2.90  to  $3.87,   and  $3.25  to  $7.25,
      respectively. There were no option exercises in 2002.

      On October 21,  1997,  the Company  issued  85,000  options to PARTEQ.  In
      accordance   with  EITF  96-18,   the  Company   recorded  an  expense  of
      approximately  $155,000 in 2001 as part of research and development  costs
      in the  Consolidated  Statements of  Operations.  PARTEQ has  subsequently
      assigned the right to acquire  26,911  shares under this option to certain
      individuals.  In addition,  on June 23, 1999,  the Company  issued  10,000
      options to PARTEQ.  As of December 31, 2003,  all 95,000 of these  options
      remained outstanding.

                                      F-19



      B)  WARRANTS - On January  17,  2002,  the  Company  extended  the term of
      300,000  Class B  warrants,  which  were  previously  issued  to the Chief
      Executive  Officer of the  Company,  from  January 29, 2002 to January 29,
      2007.  No  compensation  expense  resulted  from  the  extension  of these
      warrants as the intrinsic value of these warrants at the date of extension
      was zero. As of December 31, 2003,  300,000 of the remaining warrants were
      outstanding.  The exercise price of the warrants is CDN $6.79 (U.S.  $5.24
      at December 31, 2003).

      In connection  with an agreement dated October 6, 1993, the Company issued
      its investor  relations  firm a warrant to purchase up to 50,000 shares of
      the  authorized  stock of the Company at $6.00 per share.  During 2001 and
      2000, the investor relations firm exercised 25,000 shares in each year.

      In 1999 the Company issued  163,043  warrants as commission to a placement
      agent with an exercise price of $5.00 per share.  As of December 31, 2003,
      2002 and  2001,  449 of the  warrants  were  outstanding.  These  warrants
      expired on January 14, 2004.

14)   RETIREMENT PLAN

      Effective  January 1, 1996, the Company adopted a  tax-qualified  employee
      savings and  retirement  401(k) Profit  Sharing Plan (the "401(k)  Plan"),
      covering all qualified employees. Participants may elect a salary deferral
      of at least 1% as a contribution to the 401(k) Plan, up to the statutorily
      prescribed annual limit for tax-deferred contributions. Effective February
      1,  2003,  DUSA  matches  a  participant's  contribution  up to 1.25% of a
      participant's salary (the "Match"),  subject to certain limitations of the
      401(k) Plan. Participants will vest in the Match at a rate of 25% for each
      year of service to DUSA. The Company's  matching  contribution in 2003 was
      $33,000.

15)   COMMITMENTS AND CONTINGENCIES

      A) PARTEQ AGREEMENTS - The Company licenses certain patents underlying its
      Levulan(R)  PDT/PD systems under a license  agreement with PARTEQ Research
      and  Development  Innovations,  the licensing  arm of Queen's  University,
      Kingston,  Ontario.  Under the agreement,  the Company has been granted an
      exclusive  worldwide  license,  with a right to  sublicense,  under PARTEQ
      patent  rights,  to  make,  have  made,  use and  sell  certain  products,
      including ALA. The agreement covers certain use patent rights.

      When the Company is selling its products directly, it has agreed to pay to
      PARTEQ royalties of 6% and 4% on 66% of the net selling price in countries
      where patent rights do and do not exist, respectively.  In cases where the
      Company has a sublicensee, it will pay 6% and 4% when patent rights do and
      do not  exist,  respectively,  on its net  selling  price less the cost of
      goods for products sold to the sublicensee, and 6% of payments the Company
      receives on sales of products by the sublicensee.

      For the years ended  December 31, 2003,  2002 and 2001,  actual  royalties
      based on product sales were approximately  $36,000,  $12,000,  and $3,000,
      respectively,  however,  based on the annual minimum royalty requirements,
      the Company incurred total royalty expense of $74,000, $64,000 and $63,000
      in 2003, 2002, and 2001, respectively,  which has been recorded in cost of
      product sales and royalties.  Commencing  with the initial product launch,
      annual minimum  royalties to PARTEQ must total at least CDN $100,000 (U.S.
      $77,000 as of December 31, 2003).


                                      F-20



      The Company is also  obligated to pay 5% of any lump sum  sublicense  fees
      paid  to the  Company,  such  as  milestone  payments,  excluding  amounts
      designated by the sublicensee for future research and development efforts.

      B) LEASE  AGREEMENTS - The Company has entered into lease  commitments for
      office  space  in  Wilmington,  Massachusetts,  Valhalla,  New  York,  and
      Toronto,  Ontario. The Company has the ability to terminate its Wilmington
      lease after the 10th year (2011) of the lease by  providing  the  landlord
      with notice at least seven and one-half  months prior to the date on which
      the termination would be effective.  The minimum lease payments  disclosed
      below include the non-cancelable terms of the leases. Future minimum lease
      payments  related to these agreements for years subsequent to December 31,
      2003 are as follows:

                                                          MINIMUM LEASE PAYMENTS
                                                          ----------------------

                        2004                                          $  417,000
                        2005                                             465,000
                        2006                                             400,000
                        2007                                             410,000
                        2008                                             418,000
                        Beyond 2008                                    1,602,000
                                                                      ----------
                                                                      $3,712,000
                                                                      ==========

      Rent  expense  incurred  under these  operating  leases was  approximately
      $471,000,  $458,000,  and $461,000 for the years ended  December 31, 2003,
      2002, and 2001, respectively.

      C)  RESEARCH  AGREEMENTS  - The  Company  has  entered  into a  series  of
      agreements for research projects and clinical studies.  As of December 31,
      2003,  future  payments  to be made  pursuant to these  agreements,  under
      certain terms and conditions,  totaled approximately  $1,822,000 for 2004.
      On October 4,  2001,  the  Company  executed a master  service  agreement,
      effective June 15, 2001,  with  Therapeutics,  Inc. for an initial term of
      two years, with annual renewal periods thereafter,  to engage Therapeutics
      to manage the clinical  development of the Company's products in the field
      of dermatology.  The agreement was renewed on June 15, 2003 for a one year
      period.  Minimum  payments  under this agreement have been included in the
      total future payments as noted above.  Upon execution of this agreement in
      2001,  Therapeutics  received  5,000 shares of the Company's  common stock
      valued at $55,000, and is entitled to receive a bonus, in cash or stock at
      the Company's  discretion,  upon each  anniversary of the effective  date.
      Therapeutics has the opportunity for additional stock grants, bonuses, and
      other  incentives  for each product  indication  ranging from  $250,000 to
      $1,250,000  depending on the  regulatory  phase of development of products
      during Therapeutics' management.


                                      F-21



      D) LEGAL MATTERS - On April 12, 2002, the Company received notice that one
      of the patents  licensed to the Company by PARTEQ  Research &  Development
      Innovations,   the  technology  transfer  arm  of  Queen's  University  at
      Kingston, Ontario was challenged by PhotoCure ASA. PhotoCure ASA has filed
      a lawsuit in Australia  alleging that Australian Patent No. 624985,  which
      is one of the patents  relating  to the  Company's  5-aminolevulinic  acid
      technology,   is  invalid.  As  a  consequence  of  this  action,  Queen's
      University has assigned the Australian  patent to the Company so that DUSA
      may  participate  directly  in this  litigation.  The  Company has filed a
      response setting forth its defenses,  in addition to a related countersuit
      alleging that certain  activities of PhotoCure and its marketing  partner,
      Galderma S.A., infringe the patent. The case is ongoing and the Company is
      unable to predict the outcome at this time. The Company  believes that the
      final hearing in the Federal Court of Australia will occur in April 2004.

      In March 2003, the Company received notice that its Netherlands patent was
      being formally  challenged by an anonymous  agent, and DUSA filed a formal
      response to the opposition. The Netherlands Patent Office.

      In December  2003,  the  Company was served with a complaint  filed in the
      State of Michigan  Circuit  Court for the County of Oakland  alleging that
      DUSA's  BLU-U(R)  caused  the  plaintiff  to suffer a seizure  during  the
      performance  of her duties as an office  assistant.  The  complaint  names
      Berlex  Laboratories,  Inc., a subsidiary of our former marketing partner,
      as another defendant. The case has been removed to the U.S. District Court
      for the Eastern District of Michigan  Southern  Division.  The damages are
      unspecified.  The Company is  reviewing  the  complaint  with  counsel and
      investigating the matter at this time. While it is not possible to predict
      or determine  the outcome of this action,  the Company  believes  that the
      costs  associated  with all such matters will not have a material  adverse
      effect on its  consolidated  financial  position  or  liquidity  but could
      possibly be material to the consolidated  results of operations in any one
      accounting period to the extent costs are not covered by DUSA's insurance.

      The Company has not accrued  any amounts for  settlement  at December  31,
      2003.

      E) LICENSE AND SUPPLY  AGREEMENTS - In December 2002,  DUSA entered into a
      License  and  Development  Agreement  with  Photonamic  GmbH & Co.  KG,  a
      subsidiary of medac GmbH, a German  pharmaceutical  company,  and a supply
      agreement with medac.  These agreements  provide for the licensing to DUSA
      of Photonamic's  proprietary technology related to ALA for systemic dosing
      in the field of brain cancer. Based on the license agreement,  DUSA made a
      non-refundable  $500,000  milestone  payment to Photonamic  in 2003.  This
      liability   was  charged  to  research  and   development   costs  in  the
      Consolidated  Statement of Operations  in 2002,  and was included in other
      accrued expenses in the  Consolidated  Balance Sheet at December 31, 2002.
      The Company may also be obligated to pay certain regulatory  milestones of
      $1,250,000  upon FDA acceptance of a registration  application for a brain
      cancer product in the United  States,  and an additional  $1,250,000  upon
      registration  of the product and royalties of 12.5% on net sales under the
      terms of the License and Development Agreement.  The Company will purchase
      product under the supply  agreement for mutually agreed upon  indications.
      Should Photonamic's  clinical study be successful,  DUSA will be obligated
      to proceed with  development  of the product in the United States in order
      to retain the license for the use of the technology to treat brain cancer.
      Such additional obligations are undeterminable at this time.


                                      F-22



16)   SUBSEQUENT EVENTS

      A) PRIVATE  PLACEMENT  - On March 2, 2004,  the Company  issued  2,250,000
      shares of its common stock in a private placement pursuant to Regulation D
      of the  Securities Act of 1933 at $11.00 per share.  The Company  received
      gross proceeds of $24,750,000.  The Company has also granted the investors
      the right to purchase up to an aggregate of 337,500  additional  shares of
      common  stock at $11.00  per share.  These  additional  investment  rights
      expire April 14, 2004, or 30 trading days from closing,  which occurred on
      March 2, 2004. In addition,  135,000 shares of common stock were issued as
      commission and non-refundable retainer to the placement agent.

      B)  REACQUISITION  OF CANADIAN  RIGHTS - On February 24, 2004, the Company
      reacquired the rights to the aminolevulinic  acid (Levulan(R))  technology
      for Canada held by Draxis Health Inc. These rights were initially assigned
      to Draxis in 1991 at the time of the  original  licensing  of the  patents
      underlying  our   Levulan(R)   PDT  platform  from  PARTEQ   Research  and
      Development   Innovations,   the  licensing  arm  of  Queen's  University,
      Kingston,  Ontario.  The Company and Draxis  terminated the assignment and
      DUSA agreed to pay an upfront fee and a royalty on sales of the Levulan(R)
      Kerastick(R)  in  Canada  over a five year term from the date of the first
      commercial sale. The commercial launch of the Company's products in Canada
      is expected to occur in 2004.



                                      F-23



                                   SIGNATURES

      Pursuant  to the  requirements  of Section  13 or 15(d) of the  Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.


(Registrant) DUSA Pharmaceuticals, Inc.
             --------------------------------------

By (Signature and Title)  /s/D. Geoffrey Shulman
                          President and Chief Executive Officer
                          -----------------------------------------------

Date: March 16, 2004
      --------------

      Pursuant to the requirements of the Securities  Exchange Act of 1934, this
report  has  been  signed  below  by the  following  persons  on  behalf  of the
Registrant and in the capacities and on the dates indicated.




                                                                                              
/s/ D. Geoffrey Shulman                   Director,   President   and   Chief   Executive           March 16, 2004
--------------------------                Officer (principal executive officer)                     ----------------
D. Geoffrey Shulman, MD,                                                                            Date
FRCPC


/s/Mark  C. Carota                        Vice President, Operations                                March 16, 2004
--------------------------                                                                          ----------------
Mark C. Carota


/s/Peter M. Chakoutis                     Vice  President  and  Chief  Financial  Officer           March 16, 2004
--------------------------                (principal financial and accounting officer)              ----------------
Peter M. Chakoutis


/s/Richard C. Christopher                 Vice   President,    Financial   Planning   and           March 16, 2004
--------------------------                Business Analysis                                         ----------------
Richard C. Christopher


/s/Scott L. Lundahl                       Vice  President,   Intellectual   Property  and           March 16, 2004
--------------------------                Regulatory Affairs                                        ----------------
Scott L. Lundahl


/s/Stuart L. Marcus                       Vice President, Scientific Affairs                        March 16, 2004
--------------------------                                                                          ----------------
Stuart L. Marcus, MD, PhD


/s/David Page                             Associate Vice President, Sales                           March 16, 2004
--------------------------                                                                          ----------------
David Page


/s/Paul A. Sowyrda                        Vice President, Product                                   March 16, 2004
--------------------------                                                                          ----------------
Paul A. Sowyrda                           Marketing and Sales


/s/John H. Abeles                         Director                                                  March 16, 2004
--------------------------                                                                          ----------------
John H. Abeles


/s/David Bartash                          Director                                                  March 16, 2004
--------------------------                                                                          ----------------
David Bartash


/s/Jay M. Haft                            Chairman of the Board and Director                        March 16, 2004
--------------------------                                                                          ----------------
Jay M. Haft, Esq.


/s/Richard C. Lufkin                      Director                                                  March 16, 2004
--------------------------                                                                          ----------------
Richard C. Lufkin


/s/Magnus Moliteus                        Director                                                  March 16, 2004
--------------------------                                                                          ----------------
Magnus Moliteus






                                  EXHIBIT INDEX

3(a.1)     Certificate of  Incorporation,  as amended,  filed as Exhibit 3(a) to
           the  Registrant's  Form 10-K for the fiscal year ended  December  31,
           1998, and is incorporated herein by reference;

3(a.2)     Certificate  of Amendment to the  Certificate  of  Incorporation,  as
           amended,  dated  October  28,  2002 and filed as Exhibit  99.3 to the
           Registrant's  Quarterly  Report on Form 10-Q for the  fiscal  quarter
           ended  September 30, 2002,  filed November 12, 2002 and  incorporated
           herein by reference; and

3(b)       By-laws of the Registrant.

4(a)       Common Stock specimen, filed as Exhibit 4(a) to the Registrant's Form
           10-K for the fiscal year ended December 31, 2002, and is incorporated
           herein by reference;

4(b)       Class  B  Warrant,   filed  as  Exhibit   4.3  to  the   Registrant's
           Registration Statement on Form S-1, No. 33-43282, and is incorporated
           herein by reference;

4(c)       Rights Agreement filed as Exhibit 4.0 to Registrant's  Current Report
           on Form 8-K dated September 27, 2002,  filed October 11, 2002, and is
           incorporated herein by reference; and

4(d)       Rights  Certificate  relating  to the  rights  granted  to holders of
           common  stock  under the Rights  Agreement  filed as  Exhibit  4.0 to
           Registrant's  Current Report on Form 8-K,  dated  September 27, 2002,
           filed October 11, 2002, and is incorporated herein by reference.

10(a)      License Agreement between the Company,  PARTEQ and Draxis Health Inc.
           dated  August 27,  1991,  filed as Exhibit  10.1 to the  Registrant's
           Registration Statement on Form S-1, No. 33-43282, and is incorporated
           herein by reference;

10(b)      ALA  Assignment  Agreement  between the Company,  PARTEQ,  and Draxis
           Health  Inc.  dated  October  7, 1991,  filed as Exhibit  10.2 to the
           Registrant's Registration Statement on Form S-1, No. 33-43282, and is
           incorporated herein by reference;

10(b.1)    Amended and Restated Assignment between the Company and Draxis Health
           Inc.,  dated  April  16,  1999,  filed  as  Exhibit  10(b.1)  to  the
           Registrant's  Form 10-K for the fiscal year ended  December 31, 1999,
           and is incorporated herein by reference;

10(b.2)    Termination  and  Transfer  Agreement  between the Company and Draxis
           Health Inc.,  dated as of February  24, 2004,  portions of which have
           been  omitted  pursuant  to  a  request  for  confidential  treatment
           pursuant to Rule 24b-2 of the  Securities  Exchange  Act of 1934,  as
           amended;




10(c)      Employment  Agreement of D. Geoffrey Shulman, MD, FRCPC dated October
           1,  1991,  filed as  Exhibit  10.4 to the  Registrant's  Registration
           Statement on Form S-1, No.  33-43282,  and is incorporated  herein by
           reference;

10(d)      Amendment to Employment  Agreement of D. Geoffrey Shulman,  MD, FRCPC
           dated  April 14,  1994,  filed as  Exhibit  10.4 to the  Registrant's
           Registration Statement on Form S-2, No. 33-98030, and is incorporated
           hereby by reference;

10(e)      Amended and Restated License Agreement between the Company and PARTEQ
           dated March 11, 1998, filed as Exhibit 10(e) to the Registrant's Form
           10-K/A  filed on June 18,  1999,  portions  of  Exhibit  A have  been
           omitted pursuant to a request for confidential  treatment pursuant to
           Rule 24b-2 of the Securities Exchange Act of 1934 and Rule 406 of the
           Securities Act of 1933, and is incorporated herein by reference;

10(f)      Incentive  Stock Option Plan,  filed as Exhibit 10.11 of Registrant's
           Registration Statement on Form S-1, No. 33-43282, and is incorporated
           herein by reference;

10(g)      1994 Restricted Stock Option Plan, filed as Exhibit 1 to Registrant's
           Schedule 14A Definitive  Proxy Statement dated April 26, 1995, and is
           incorporated herein by reference;

10(h)      1996 Omnibus  Plan, as amended,  filed as Appendix A to  Registrant's
           Schedule 14A Definitive  Proxy Statement dated April 26, 2001, and is
           incorporated herein by reference;

10(h.1)    1996 Omnibus Plan, as amended on May 1, 2003;

10(i)      Purchase  and Supply  Agreement  between  the  Company  and  National
           Biological Corporation dated November 5, 1998, filed as Exhibit 10(i)
           to the Registrant's  Form 10-K/A filed on June 18, 1999,  portions of
           which  have  been  omitted  pursuant  to a request  for  confidential
           treatment  pursuant to Rule 24b-2 of the  Securities  Exchange Act of
           1934 and Rule 406 of the Securities Act of 1933, and is  incorporated
           herein by reference;

10(j)      Supply  Agreement  between the Company and Sochinaz SA dated December
           dated December 24, 1993,  filed as Exhibit 10(q) to Registrants  Form
           10-K/Afiled  on March 21,  2000,  portions of which have been omitted
           pursuant to a request  for  confidential  treatment  pursuant to Rule
           24b-2 of the  Securities  Exchange Act of 1934,  and is  incorporated
           herein by reference;




10(j.1)    First Amendment to Supply Agreement  between the Company and Sochinaz
           SA dated July 7, 1994 filed as Exhibit 10(q.1) to Registrant's Annual
           Report on Form 10-K for the fiscal year ended  December 31, 1999, and
           is incorporated herein by reference;

10(j.2)    Second amendment to Supply Agreement between the Company and Sochinaz
           SA dated as of June 20, 2000,  filed as Exhibit 10.1 to  Registrant's
           Current Report on Form 8-K dated June 28, 2000,  and is  incorporated
           herein by reference;

10(k)      Master Service Agreement  between the Company and Therapeutics,  Inc.
           dated  as  of  October  4,  2001,  filed  as  Exhibit  10(b)  to  the
           Registrant's  quarterly  report on Form 10-Q for the  fiscal  quarter
           ended September 30, 2001,  filed November 8, 2001,  portions of which
           have been omitted  pursuant to a request for  confidential  treatment
           under Rule 24b-2 of the  Securities  Exchange Act of 1934, as amended
           and is incorporated herein by reference;

10(l)      Commercial  Loan  Agreement,  Secured Term Loan  Promissory  Note and
           Pledge and Security  Agreement  between the Company and Citizens Bank
           of  Massachusetts  dated May 13,  2002 filed as  Exhibit  99.1 to the
           Registrant's  Quarterly  Report on Form 10-Q for the  fiscal  quarter
           ended March 31, 2002, filed May 14, 2002, and is incorporated  herein
           by reference;

10(m)      Collaboration  Termination  Agreement,  effective  September 1, 2002,
           between the Company and Schering AG, the Company's  former  marketing
           partner,  filed as Exhibit 10 to Registrant's  Current Report on Form
           8-K dated August 27, 2002, and is incorporated herein by reference;

10(n)      License and Development  Agreement between the Company and Photonamic
           GmbH & Co. KG dated as of December 30, 2002,  filed as Exhibit  10(r)
           to Registrant's  Annual Report on Form 10-K for the fiscal year ended
           December 31, 2002,  portions of which have been omitted pursuant to a
           request  for  confidential   treatment  under  Rule  24(b)-2  of  the
           Securities  Exchange  Act of 1934,  as amended,  and is  incorporated
           herein by reference;

10(o)      Supply  Agreement  between  the  Company  and medac  GmbH dated as of
           December  30, 2002,  filed as Exhibit  10(s) to  Registrant's  Annual
           Report on Form 10-K for the fiscal  year  ended  December  31,  2002,
           portions  of which  have  been  omitted  pursuant  to a  request  for
           confidential  treatment under Rule 24(b)-2 of the Securities Exchange
           Act of 1934, as amended, and is incorporated herein by reference.

10(p)      Securities  Purchase  Agreement dated as of February 27, 2004, by and
           among the Company and certain investors, filed as Exhibit 10.1 to the
           Registrant's  current  report  on Form 8-K,  filed on March 2,  2004,
           portions  of which  have  been  omitted  pursuant  to a  request  for
           confidential  treatment  under Rule 24(b) of the Securities  Exchange
           Act of 1934, as amended, and is incorporated herein by reference;




10(q)      Registration  Rights  Agreement  dated as of February 27, 2004 by and
           among the Company and certain investors, filed as Exhibit 10.2 to the
           Registrant's  current report on Form 8-K, filed on March 2, 2004, and
           is incorporated herein by reference;

10(r)      Form of  Additional  Investment  Right dated as of February 27, 2004,
           filed as Exhibit 10.3 to the Registrant's current report on Form 8-K,
           filed on March 2, 2004, and is incorporated herein by reference; and

10(s)      Investment   Banking   Agreement  between  the  Company  and  Sunrise
           Securities Corp. entered into February 27, 2004.

14(a)      Form of DUSA  Pharmaceuticals,  Inc.  Code of  Ethics  Applicable  to
           Senior Officers.

21(a)      Subsidiary of Registrant

23(a)      Independent Auditors' Consent of Deloitte & Touche LLP.

31(a)      Rule   13a-14(a)/15d-14(a)   Certification  of  the  Chief  Executive
           Officer; and

31(b)      Rule   13a-14(a)/15d-14(a)   Certification  of  the  Chief  Financial
           Officer.

32(a)      Certification  of the Chief Executive  Officer  pursuant to 18 U.S.C.
           Section   1350,   as  adopted   pursuant   to  Section   906  of  the
           Sarbanes-Oxley Act of 2002; and

32(b)      Certification  of the Chief Financial  Officer  pursuant to 18 U.S.C.
           Section   1350,   as  adopted   pursuant   to  Section   906  of  the
           Sarbanes-Oxley Act of 2002.

99(a)      Press Release dated March 16, 2004.