[DUSA LOGO]                                                      EXHIBIT 99(a)

INNOVATION IN PHOTODYNAMIC THERAPY

DUSA PHARMACEUTICALS, INC. (R)
FOR RELEASE AT 8:00 A.M. EASTERN

                          DUSA PHARMACEUTICALS REPORTS
               FOURTH QUARTER AND FULL YEAR 2003 FINANCIAL RESULTS

                 AND CORPORATE HIGHLIGHTS; AND SUBSEQUENT EVENTS

WILMINGTON,  MA. MARCH 16, 2004 - DUSA Pharmaceuticals,  Inc. (NASDAQ NMS: DUSA)
announced  today its fourth  quarter  and full year 2003  financial  results and
corporate  highlights.  During the fourth quarter,  the Company's  revenues from
product sales increased to $516,000,  compared to $162,000 in 2002, based on the
previously reported increase in sales of our Levulan(R) Kerastick(R), as well as
increased sales of the Company's  BLU-U(R) brand light source.  Other highlights
of the fourth  quarter  included the launch of DUSA's direct sales force,  along
with the signing of a number of independent sales representative  agreements. We
also added a second drug distribution channel,  enjoyed strong representation at
a number of dermatology  educational  meetings,  and completed our Phase IV long
term actinic keratoses (AK) tracking study.

Subsequent  to  year-end,   we  reported  a  very  solid   response  to  Levulan
Photodynamic  Therapy  (PDT) at the annual  meeting of the  American  Academy of
Dermatology (AAD); the start-up of Kerastick manufacturing at our Wilmington, MA
facility;  the reacquisition of full Canadian rights to our technology;  and the
decision  to  increase  the  size of the  sales  force  based  on  significantly
increased demand for our therapy.  Recently,  we also strengthened our financial
position with a private  placement of 2,250,000  shares of our common stock that
raised gross proceeds of $24,750,000. The Company will use the proceeds from the
sale of these  securities  to expand  our sales  force and for  working  capital
purposes,  including  research and  development  activities,  and for  potential
product acquisitions.

We are also pleased to be able to report that the positive sales trends achieved
in Q4 have  continued in the first  quarter of 2004.  Interest in our therapy at
the South Beach  Symposium,  held  immediately  after the AAD meeting,  was very
strong,  and we have since  supported a number of continuing  medical  education
(CME)  meetings  across the country.  The actual  number of  Kerastick  sales to
customers during Q1 04 will be reported after the end of the quarter.

In light of the  increased  demand for our therapy,  we have decided to at least
double the size of our direct sales force of area managers and  representatives,
from the current level of 8 to 16, with the potential  for  additional  hires as
the year  progresses.  We have also  continued  to make  excellent  progress  in
obtaining  private  insurance  coverage for our therapy so that  patients may be
reimbursed for their Levulan PDT treatment of AKs.

We have  also  continued  to make  progress  on our new  indication  development
programs. These include a proposed Phase II short drug contact photodamaged skin
study,  a new Phase II short drug contact study for the treatment of moderate to
severe acne vulgaris  with Levulan and the BLU-U,  and a pilot Phase II Barretts
esophagus  high-grade  dysplasia  trial  designed  to test  our new  proprietary
endoscopic light delivery device. In



addition,  we received  approval from Health Canada to amend our medical  device
license to market the BLU-U for light alone treatment of acne.

Since year-end,  there has also been a positive development on the patent front.
We had previously received notice that our Netherlands patent was being formally
challenged  by an  anonymous  agent,  and we had filed a formal  response to the
opposition.  After  receiving  submissions  from both parties,  the  Netherlands
Patent  Office issued a notice that our patent was upheld and granted in amended
form.  Although the opposing party had the right to appeal the decision,  we are
now pleased to report that the deadline  for the appeal has expired.  Meanwhile,
the  Australian  patent dispute is scheduled to go to trial during April of this
year.

FINANCIAL HIGHLIGHTS:

For the three months ended December 31, 2003,  DUSA's net loss was ($3,770,000),
or ($0.27) per common share, compared to a loss of ($3,693,000),  or ($0.27) per
common  share for 2002.  For the twelve  months ended  December  31,  2003,  the
Company  incurred a net loss of  ($14,827,000),  or ($1.06) per common share, as
compared to a net income for 2002 of $5,763,000,  or $0.42 per common share. The
prior year period included the one-time recognition of certain items as a result
of the  September  2002  termination  of our former  marketing  and  development
collaboration,  including  $20,990,000 of research grant and milestone  revenue,
and charges to cost of product sales and research and development costs totaling
$2,638,000 and $639,000,  respectively.  As a result of the recognition of these
items, net income for 2002 was increased by approximately $17,713,000,  or $1.28
per common share.

Revenues  for the three months  ended  December 31, 2003  increased to $516,000,
compared to $162,000 in 2002, due primarily to higher Kerastick  end-user sales.
In addition,  the Company began  selling the BLU-U during the quarter  following
our receipt of market  clearance  from the FDA in  September  2003 to market the
BLU-U as a stand alone device for the  treatment of moderate  inflammatory  acne
vulgaris.  Revenues for the twelve months ended December 31, 2003 were comprised
of $970,000 in product sales,  as compared to product sales of $319,000 in 2002.
Revenues  for 2002 also  included  research  grant  and  milestone  revenues  of
$22,312,000 and  co-development  revenue of $2,851,000 that was earned under our
former marketing and development collaboration.

Research and  development  expenses for the three months ended December 31, 2003
decreased to $1,237,000, compared to $2,802,000 in 2002. This decrease is mainly
attributable  to the  re-assignment  of  resources  as of  January  1,  2003  to
marketing and sales functions that were  previously  functioning in research and
development  roles.  Research and development  costs for the twelve months ended
December 31, 2003 decreased to $5,404,000,  compared to $12,122,000 in 2002, due
primarily  to the  absence  of  co-sponsored  project  costs  under  our  former
marketing and development collaboration, and the aforementioned re-assignment of
resources to marketing  and sales  functions.  The 2002 period also included the
write-off  of  $639,000  of  previously  deferred  costs  as  a  result  of  the
collaboration  termination,  and a $500,000  milestone  payment  under a license
agreement signed in December 2002 for proprietary  technology related to ALA for
systemic dosing in the field of brain cancer.

Marketing  and sales costs for the three and twelve  months  ended  December 31,
2003 were  $896,000  and  $2,494,000,  which  includes  $517,000  and  $924,000,
respectively,   of  payroll  related  costs,   including   direct  and  indirect
commissions. As of January 1, 2003, we reassigned resources that were previously
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.  In 2002,  there were no  marketing  and sales  expenses
incurred  directly  by DUSA as all rights  and  activities  associated  with the
marketing and sales of our products were the sole  responsibility  of our former
partner.  We  anticipate  that the level of marketing  and sales  expenses  will
continue to  increase in 2004 as we expand our sales  capacity to keep pace with
the success of our sales initiatives.

General and administrative expenses for the three months ended December 31, 2003
increased to  $1,561,000,  compared to $1,487,000 in 2002,  due primarily to the
legal costs  associated with the challenge to our Australian  patent and related
patent issues.  General and administrative  expenses for the twelve months ended
December 31, 2003 increased to  $6,344,000,  compared to $5,591,000 in 2002, due
mainly to higher legal expenses of  $3,253,000,  compared to $1,970,000 in 2002.
Increased legal expenses were partly offset by lower 2003 staffing related costs
of approximately $458,000, due primarily to employee separations during 2002. It
is expected  that legal costs will stay  elevated as long as the patent  dispute
continues.

As of  December  31,  2003,  total cash,  cash  equivalents,  and United  States
government  securities,   including  long-term  instruments,  were  $37,969,000,
compared to $52,880,000 at the end of 2002.  Long-term debt,  including  current
maturities,  as of December 31, 2003 was  $1,518,000,  compared to $1,788,000 at
the end of 2002.

DUSA PHARMACEUTICALS, INC.
CONDENSED 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
          Accounts receivable                              229,483        36,720
          Inventory                                        712,831     1,188,659
          Other current assets                           1,534,209     1,615,368
                                                       -----------   -----------
             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 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 and accrued expenses        $ 2,818,039   $ 3,099,643
                                                       -----------   -----------
          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 maturities      1,247,500     1,517,500
                                                       -----------   -----------
       TOTAL LIABILITIES                                 4,465,439     4,892,243
       TOTAL SHAREHOLDERS' EQUITY                       40,232,049    56,057,730
                                                       -----------   -----------
                                                       $44,697,488   $60,949,973
       TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY      ===========   ===========






DUSA PHARMACEUTICALS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS



                                                 THREE MONTHS ENDED            TWELVE MONTHS ENDED
                                                    DECEMBER 31,                  DECEMBER 31,
                                           ---------------------------    ----------------------------
                                               2003           2002             2003           2002
                                           -----------    ------------    -------------   ------------
REVENUES
                                                                              
   Product sales and rental income        $    516,309    $    162,008    $    970,109    $   319,378
   Research grant and milestone revenue             --              --              --     22,312,498
   Research revenue earned under                    --              --              --      2,851,362
      collaborative agreements

                                          ------------    ------------    ------------    -----------
TOTAL REVENUES                                 516,309         162,008         970,109     25,483,238
                                          ------------    ------------    ------------    -----------

OPERATING COSTS

   Cost of product sales and royalties       1,016,581         557,329       3,481,248      5,253,424
   Research and development                  1,236,840       2,801,715       5,403,961     12,121,606
   Marketing and sales                         895,801              --       2,494,405             --
   General and administrative                1,561,295       1,486,529       6,343,680      5,591,039
                                          ------------    ------------    ------------    -----------
TOTAL OPERATING COSTS                        4,710,517       4,845,573      17,723,294     22,966,069
                                          ------------    ------------    ------------    -----------
INCOME (LOSS) FROM OPERATIONS               (4,194,208)     (4,683,565)    (16,753,185)     2,517,169
OTHER INCOME, NET                              424,301         990,327       1,926,331      3,245,349
                                          ------------    ------------    ------------    -----------
NET INCOME (LOSS)                         $ (3,769,907)   $ (3,693,238)   $(14,826,854)   $ 5,762,518
                                          ============    ============    ============    ===========
BASIC AND DILUTED NET INCOME (LOSS) PER   $       (.27)   $       (.27)   $      (1.06)   $      0.42
   COMMON SHARE

                                          ============    ============    ============    ===========
WEIGHTED AVERAGE NUMBER OF
    COMMON SHARES OUTSTANDING               13,965,540      13,887,612      13,936,482     13,877,566
                                          ============    ============    ============    ===========


DUSA Pharmaceuticals,  Inc. is a biopharmaceutical  company engaged primarily in
the development of Levulan  Photodynamic  Therapy (PDT) and Photodetection  (PD)
for multiple medical indications.  PDT and PD utilize light-activated  compounds
such as Levulan to induce a  therapeutic  or detection  effect.  DUSA is a world
leader in topically or locally applied PDT and PD. The Company maintains offices
in Wilmington, MA, Valhalla, NY, and Toronto, Ontario.

Except  for  historical   information,   this  news  release   contains  certain
forward-looking   statements   that   involve   known  and   unknown   risk  and
uncertainties,  which may cause  actual  results to differ  materially  from any
future  results,  performance  or  achievements  expressed  or  implied  by  the
statements made. These  forward-looking  statements  relate to the timing of the
report of Kerastick  sales,  the  anticipation of increased  marketing and sales
expenses in 2004,  the  expectation  of elevated  legal  expenses and the use of
proceeds  from the  recent  private  placement.  These  statements  are  further
qualified by certain factors, including, but not limited to, changing market and
regulatory conditions, the impact of competitive products and their pricing, the
securities  regulatory process, the uncertainties of the litigation process, the
results of clinical trials and other risks identified in DUSA's SEC filings from
time to time including its Form 10-K for the year ended December 31, 2003.



For further  information  contact:  D. GEOFFREY SHULMAN,  MD, President & CEO or
SHARI LOVELL, Director,  Shareholder Services Tel: 416.363.5059 Fax 416.363.6602
or visit www.dusapharma.com