MEDIA/INVESTORS CONTACT:
Jonathan Fassberg
The Trout Group
(212) 477-9077 x16

              CYTOGEN REPORTS THIRD QUARTER 2005 FINANCIAL RESULTS

  Company announces receipt of the 2005 Frost & Sullivan Technology Innovation
        Award for its contributions to the development of novel therapies
                incorporating PSMA for combating prostate cancer.

  Company remains on track for filing an investigational new drug application
     of its lead therapeutic product candidate for the treatment of hormone
            refractory prostate cancer in the first quarter of 2006.

PRINCETON,  N.J., (NOVEMBER 2, 2005) -- Cytogen Corporation (Nasdaq: CYTO) today
reported  its  consolidated  financial  results  for the third  quarter and nine
months ended September 30, 2005.

FINANCIAL HIGHLIGHTS
- --------------------

     o    Total  revenues  for the  third  quarter  of 2005  were  $3.6  million
          compared to $3.3  million in the third  quarter of 2004.  For the nine
          months ended  September  30, 2005,  total  revenues were $11.7 million
          compared to $10.8 million in the same period of 2004.

     o    Gross margin for the nine months ended  September 30, 2005 improved to
          39% compared to 35% for the same period in 2004.

     o    Cytogen  reported a net loss of $7.8  million,  or $0.44 per basic and
          diluted share in the third quarter of 2005,  compared to $5.6 million,
          or $0.36 per basic and diluted share, for the same period in 2004. For
          the nine months ended  September  30,  2005,  total net loss was $22.2
          million,  or $1.36 per  basic and  diluted  share,  compared  to $14.3
          million,  or $0.99 per basic and diluted share,  in the same period of
          2004.   The   increase  in  net  loss  results   primarily   from  the
          implementation  of new  marketing  initiatives  and  expansion  of the
          Company's sales force,  which was  substantially  completed in January
          2005.

"We believe  that we are pursuing the right  commercial  strategies  to increase
product  sales  within  their  current   indications   and  the  right  clinical
development strategies to realize their full potential," said Michael D. Becker,
Cytogen's  president and chief  executive  officer.  "Our  clinical  development
initiatives with QUADRAMET in combination with various  potentially  synergistic
agents,   PROSTASCINT  for  monitoring   treatment   response  and  image-guided
applications, and our pipeline of product candidates targeting prostate-specific
membrane antigen (PSMA) are all of great interest to key opinion leaders who see
value in these innovative molecules.  We look forward to reporting progress with
these initiatives in the months ahead."

PRODUCT REVENUE
- ---------------

QUADRAMET

QUADRAMET is Cytogen's flagship product for the relief of pain due to metastatic
bone disease arising from prostate,  breast, multiple myeloma and other types of
cancer. Sales of QUADRAMET were $2.0 million for the quarter ended September 30,
2005  compared to $1.9 million for the same period in 2004.  For the nine months
ended September 30, 2005,  sales of QUADRAMET were $6.2 million compared to $5.4
million in the same period of 2004.





PROSTASCINT

Sales  of   PROSTASCINT   kits,  the  first  and  only   commercial   monoclonal
antibody-based  agent  that  targets  PSMA to image  the  extent  and  spread of
prostate  cancer,  were $1.5 million for the quarter  ended  September  30, 2005
compared to $1.3 million in the same period of 2004.  For the nine month periods
ended September 30, 2005 and 2004,  sales of PROSTASCINT were $5.3 million each,
demonstrating a consistent demand for the product year-over-year.

Cytogen's  strategy for  increasing  product sales is centered on key drivers of
long-term  growth for both  QUADRAMET  and  PROSTASCINT.  For  QUADRAMET,  these
drivers include:  (i) distinguishing  the physical  properties of QUADRAMET from
first-generation  agents within its class,  (ii) empowering and marketing to key
prescribing  audiences,  (iii)  broadening  palliative  use within  label beyond
prostate  cancer to include  breast,  lung,  multiple  myeloma,  (iv) clinically
evaluating  the role of  QUADRAMET  in  combination  with  other  commonly  used
oncology  agents,  and (v) expanding  clinical  development to  demonstrate  the
potential   tumoricidal   versus   palliative   attributes  of  QUADRAMET.   For
PROSTASCINT,  these drivers include:  (i) improving image quality through fusion
technology,   (ii)  validating  the  antigen   targeted  by  PROSTASCINT  as  an
independent  prognostic  factor,  (iii)  the  publication  and  presentation  of
outcomes data, (iv) clinical development of image-guided  applications including
brachytherapy,  intensity modulated radiation therapy, surgery, and cryotherapy,
and  (v)  expanding  clinical  development  to  demonstrate  the  potential  for
PROSTASCINT  to both  monitor  response to  cytotoxic  therapies  and image PSMA
expression in other cancers.

COSTS AND EXPENSES
- ------------------

TOTAL OPERATING EXPENSES

Total  operating  expenses for the quarter  ended  September 30, 2005 were $11.5
million  compared  to $8.9  million  for the same  period in 2004.  For the nine
months ended  September 30, 2005,  total  operating  expenses were $34.2 million
compared to $25.2 million in the same period of 2004.

COST OF PRODUCT REVENUE

Cost of product  revenue for the quarters ended September 30, 2005 and September
30, 2004 were $2.4 million and $2.2 million,  respectively.  For the nine months
ended September 30, 2005,  cost of product revenue was $7.1 million  compared to
$7.0 million in the same period of 2004,  and primarily  reflects  QUADRAMET and
PROSTASCINT  manufacturing  costs,  royalties  paid by Cytogen on the  Company's
product sales, and the amortization of the up-front payment to Berlex in 2003 to
reacquire the marketing rights to QUADRAMET.

SG&A EXPENSES

Selling, general and administrative expenses for the quarter ended September 30,
2005 were $6.7 million compared to $5.3 million for the same period in 2004. For
the  nine  months  ended  September  30,  2005,   total  selling,   general  and
administrative expenses were $20.5 million compared to $14.1 million in the same
period of 2004. The increase in selling,  general and administrative expenses is
primarily  driven by  expanded  investment  for the  commercial  support of both
QUADRAMET  and  PROSTASCINT,  including  the  implementation  of  new  marketing
initiatives and expansion of the Company's sales force,  which was substantially
completed in January 2005.

R&D EXPENSES

Research and development  expenses for the quarter ended September 30, 2005 were
$1.7  million  compared  to $608,000  for the same period in 2004.  For the nine
months ended September 30, 2005,  total research and  development  expenses were
$3.8 million  compared to $2.0 million in the same period of 2004.  The increase
in





research  and  development   expenses  is  primarily   driven  by  new  clinical
development initiatives for both QUADRAMET and PROSTASCINT and a $500,000 charge
in the second quarter of 2005 for a non-cash  milestone  payment  related to the
progress of PSMA  development  programs.  In addition,  research and development
expenses  include  preclinical  development  costs associated with the Company's
lead therapeutic product candidate  incorporating the same 7E11.C5.3  monoclonal
antibody  utilized in  PROSTASCINT  linked to a  therapeutic  payload to deliver
lethal doses of radiation to PSMA-expressing cells.

EQUITY IN LOSS OF JOINT VENTURE

Joint venture  research and development  expenses  reflect costs associated with
the PSMA  Development  Company LLC ("PDC"),  a joint venture between Cytogen and
Progenics Pharmaceuticals,  Inc., for the development of in vivo immunotherapies
targeting PSMA. Cytogen's share of the equity in the loss of PDC for the quarter
ended  September 30, 2005 was $677,000  compared to $805,000 for the same period
of 2004. For the nine months ended  September 30, 2005,  Cytogen's  share of the
equity in the loss of PDC was $2.9 million compared to $2.2 million for the same
period in 2004.  The nine months ended  September  30, 2005  reflects  Cytogen's
share of the $2.0 million  upfront fee incurred in the second quarter of 2005 by
PDC to license proprietary antibody-drug conjugate (ADC) technology from Seattle
Genetics,  Inc. for use with PDC's  antibodies  targeting  PSMA,  as  previously
communicated in June 2005.

INVENTORIES

Inventories as of September 30, 2005 were $4.5 million  compared to $3.6 million
as of December 31, 2004.  The increase in  inventories  is due  primarily to the
current  manufacturing  progress on  PROSTASCINT.  In  September  2004,  Cytogen
entered into a manufacturing  agreement with Laureate Pharma,  Inc.  pursuant to
which Laureate is  manufacturing  PROSTASCINT  for Cytogen in its Princeton,  NJ
facility.  Cytogen believes that the agreement will provide a sufficient  supply
of PROSTASCINT to satisfy  commercial  requirements for  approximately  the next
four years, based upon current sales levels. In addition,  Cytogen believes that
the  agreement  will  provide  sufficient  supply  of the  7E11.C5.3  monoclonal
antibody  required  for  initial  clinical  development  of the  Company's  lead
therapeutic program.

CASH POSITION
- -------------

Cytogen's  cash,  cash  equivalents  and  short-term  investments  balance as of
September  30, 2005 was $23.5  million  compared to $35.8 million as of December
31, 2004. The September 30, 2005 balance reflects a $2.3 million payment to Elan
Corporation, plc to satisfy the Company's obligations for a promissory note that
matured in August 2005 and the receipt of  approximately  $14.0 million in gross
proceeds  from the July 2005 sale of common  stock and  warrants,  which  closed
during the third quarter of 2005.

THIRD QUARTER PRODUCT AND PIPELINE HIGHLIGHTS
- ---------------------------------------------

     o    The  publication  of  positive  clinical  findings  from  a  study  of
          QUADRAMET in combination  with  gemcitabine  (Gemzar(R),  Eli Lilly) a
          nucleoside analog which is known to be a radiation sensitizer. Results
          were published in the  peer-reviewed  journal Clinical Cancer Research
          (Volume  11(19):   pages  6895-6900).   The  study  was  conducted  by
          independent investigators who evaluated the use of high dose QUADRAMET
          in conjunction with gemcitabine for the treatment of osteosarcoma. The
          lead  investigator  was  Peter  Anderson,  M.D.,  Ph.D.,  a  Pediatric
          Oncologist who performed the work at the Mayo Clinic and is now at The
          University of Texas MD Anderson  Cancer  Center,  a leading center for
          the treatment of  osteosarcoma.
     o    The  presentation  of positive data from a phase II study of QUADRAMET
          in combination with docetaxel (Taxotere(R), Aventis Pharmaceuticals, a
          member of the sanofi-aventis Group) for the treatment of patients with
          hormone refractory  prostate cancer. The results were presented at the
          12th Annual Prostate





          Cancer  Foundation   Scientific  Retreat  in  Phoenix,  AZ.  The  lead
          investigator was Anders Widmark, M.D., Ph.D., Professor, Department of
          Oncology, Umea University, Sweden.
     o    The presentation of positive preclinical findings for a novel PSMA ADC
          were  reported by PDC at the 12th Annual  Prostate  Cancer  Foundation
          Scientific Retreat.
     o    At an Analyst and Investor Meeting in September, Cytogen discussed its
          current  and  future  clinical   programs  with   presentations   from
          management  and clinical  investigators.  Topics  included  QUADRAMET,
          PROSTASCINT  and the PSMA  pipeline.  Presenters  included:  Rodney J.
          Ellis, M.D., Radiation Oncologist,  Aultman Hospital, Canton, Ohio and
          Assistant Professor Urology, CASE School of Medicine, Cleveland, Ohio;
          Adam  Brufsky,  M.D.,  Ph.D.,  Co-Director,   Assistant  Professor  of
          Medicine,   Magee-Womens   Cancer  Program  at  UPMC  Cancer  Centers,
          Pittsburgh,  Pennsylvania;  Peter Anderson,  M.D., Ph.D., Professor of
          Pediatrics,  MD Anderson Cancer Center,  Houston, Texas; and Howard I.
          Scher,   M.D.,  Chief,   Genitourinary   Oncology  Service,   Memorial
          Sloan-Kettering Cancer Center, New York, New York.
     o    On July 19, 2005, Cytogen entered into a securities purchase agreement
          with certain institutional  investors for the sale of 3,104,380 shares
          of our common  stock and 776,096  warrants  to purchase  shares of our
          common  stock having an exercise  price of $6.00 per share,  through a
          registered  direct  offering.  In exchange for $4.50,  the  purchasers
          received one share of common stock and warrants to purchase .25 shares
          of  common  stock.  These  warrants  are  exercisable  for ten  years,
          beginning six months after their issuance.  The  transaction  provided
          gross  proceeds of  approximately  $14.0 million to the Company before
          deducting costs associated with the offering.  The transaction  closed
          on July 20, 2005 and August 2, 2005.  There was no placement  agent in
          this transaction.

UPCOMING EVENTS AND ACTIVITIES
- ------------------------------

     o    Cytogen  today  announced   receipt  of  the  2005  Frost  &  Sullivan
          Technology  Innovation  Award,  in the  field of  immunotherapies  for
          prostate  cancer.  The Frost & Sullivan  Technology  Innovation  Award
          recognizes  Cytogen for its  contributions  to the  development of new
          generation in vivo  immunotherapies  incorporating  PSMA for combating
          prostate cancer. Leveraging its proprietary PSMA platform, Cytogen has
          introduced  PROSTASCINT  in the market and is  building a pipeline  of
          product  candidates that are focused  primarily on novel therapies for
          prostate cancer.
     o    In April 2005, Cytogen announced a new clinical development initiative
          for a  targeted  oncology  product  designed  to  treat  prostate  and
          potentially  other  cancers.  The product  candidate  uses  DOTA-based
          bifunctional  chelant technology to radiolabel  Cytogen's  proprietary
          7E11.C5 monoclonal  antibody to PSMA with a therapeutic  radionuclide.
          During the third  quarter of 2005,  Cytogen  initiated  the  requisite
          toxicology,   biodistribution  and  preclinical  efficacy  studies  in
          advance of filing an  investigational  new drug (IND)  application for
          the  treatment  of  hormone  refractory  prostate  cancer in the first
          quarter of 2006.
     o    An abstract titled  "Development of Optimal Lu-177 Labeled  Monoclonal
          Antibody (7E11) Constructs for  Radioimmunotherapy of Prostate Cancer"
          has  been  accepted  for  poster  presentation  at the  AACR-NCI-EORTC
          International Conference on Molecular Targets and Cancer Therapeutics:
          Discovery,   Biology,   and   Clinical   Applications,   the   premier
          international  meeting  featuring  novel  cancer  therapeutics,   held
          November  14-18,  2005  at  the  Pennsylvania   Convention  Center  in
          Philadelphia, PA.

FINANCIAL OUTLOOK FOR 2005
- --------------------------

This section  provides  forward-looking  information  about Cytogen's  financial
outlook  for 2005 based  upon our  current  operations.  The  disclosure  notice
paragraph regarding  forward-looking  statements at the end of this news release
is especially applicable to this section.





On October 4, 2005 Cytogen withdrew its previously provided revenue guidance for
the year  ending  December  31,  2005,  as the Company  anticipated  that actual
results would be lower than its previous guidance of approximately $20 million.

Gross  margin is  expected  to be within  the  company's  previous  guidance  of
approximately  40% to 50%.  Selling,  general and  administrative  expenses  are
expected to be within the company's  previous  guidance of approximately  $25 to
$30 million.  Total internal and external joint venture research and development
expenses  are  expected  to  be  within  the  company's   previous  guidance  of
approximately $10 to $15 million.

CONFERENCE CALL & WEBCAST INFORMATION
- -------------------------------------

Cytogen will  broadcast its  quarterly  investor  conference  call live over the
Internet today, November 2, 2005 at 4:15 p.m. Eastern Standard Time. The dial-in
number for the U.S. is  800-561-2718  and the pass code number is 47914567.  The
dial-in  number  for  international  callers is  617-614-3525  and the pass code
number is 47914567.  This event can also be accessed by going to  Cytogen's  Web
site, www.cytogen.com,  and clicking on the "Investor Relations" link. A link to
the webcast is under the Calendar of Events  header.  The event will be archived
and  available  for replay  starting  approximately  one hour after the call and
continuing  for 7 days  thereafter.  The replay  dial-in  number for the U.S. is
888-286-8010 and the dial-in number for  international  callers is 617-801-6888.
The replay pass code number is 42522168.

NOTE:
- -----

QUADRAMET  is  indicated  for the  relief  of pain in  patients  with  confirmed
osteoblastic  metastatic  bone lesions that enhance on  radionuclide  bone scan.
This  press  release  describes  clinical  applications  that  differ  from that
reported in the QUADRAMET package insert.

PROSTASCINT  is  indicated  as a  diagnostic  imaging  agent in newly  diagnosed
patients with biopsy-proven  prostate cancer, thought to be clinically localized
after standard diagnostic  evaluation and who are thought to be at high risk for
pelvic  lymph node  metastases.  PROSTASCINT  is also  indicated as a diagnostic
imaging agent in post-prostatectomy patients with a rising PSA and a negative or
equivocal  standard  metastatic  evaluation  in whom  there  is a high  clinical
suspicion of occult metastatic  disease.  This press release describes  clinical
applications  and imaging  performance  that differs  from that  reported in the
PROSTASCINT package insert.

A copy of the  full  prescribing  information  for  QUADRAMET  and  PROSTASCINT,
including  warnings,  precautions,  adverse events and other safety information,
may be  obtained  in the U.S.  from  Cytogen  Corporation  by calling  toll free
800-833-3533 or by visiting the web site at  www.cytogen.com,  which is not part
of this press release.

ABOUT CYTOGEN CORPORATION
- -------------------------

Founded in 1980,  Cytogen  Corporation of Princeton,  NJ is a  biopharmaceutical
company  that  acquires,   develops  and  commercializes   innovative  molecules
targeting  the  sites  and  stages of  cancer  progression.  Cytogen's  marketed
products  include  QUADRAMET(R)   (samarium  Sm-153  lexidronam  injection)  and
PROSTASCINT(R)  (capromab  pendetide)  kit for the  preparation of Indium In-111
capromab  pendetide  in the United  States.  Cytogen also has  exclusive  United
States marketing rights to COMBIDEX(R)  (ferumoxtran-10)  for all  applications,
and the exclusive right to market and sell  ferumoxytol  (previously  Code 7228)
for oncology  applications in the United States.  Cytogen's development pipeline
consists of therapeutics targeting  prostate-specific membrane antigen (PSMA), a
protein  highly  expressed  on the  surface  of  prostate  cancer  cells and the
neovasculature of solid tumors.  Full prescribing  information for the Company's
products is available at  www.cytogen.com or by calling  800-833-3533.  For more
information, please visit the Company's website at www.cytogen.com, which is not
part of this press release.





ABOUT FROST & SULLIVAN
- ----------------------

Frost & Sullivan,  a global growth consulting company,  has been partnering with
clients to support the  development  of innovative  strategies  for more than 40
years. The company's  industry expertise  integrates growth  consulting,  growth
partnership services,  and corporate management training to identify and develop
opportunities.  Frost & Sullivan  serves an extensive  clientele  that  includes
Global 1000  companies,  emerging  companies,  and the  investment  community by
providing   comprehensive  industry  coverage  that  reflects  a  unique  global
perspective   and   combines   ongoing   analysis  of   markets,   technologies,
econometrics, and demographics. For more information, visit www.frost.com.



This press release  contains  certain  "forward-looking"  statements  within the
meaning of the Private Securities  Litigation Reform Act of 1995 and Section 21E
of the Securities Exchange Act of 1934, as amended.  All statements,  other than
statements of  historical  facts,  included in this press release  regarding our
strategy,  future operations,  financial  position,  future revenues,  projected
costs,  prospects,  plans  and  objectives  of  management  are  forward-looking
statements.  Such  forward-looking  statements  involve  a number  of risks  and
uncertainties  and investors are cautioned not to put any undue  reliance on any
forward-looking  statement.  There are a number of important  factors that could
cause  Cytogen's  results  to differ  materially  from those  indicated  by such
forward-looking  statements.  In particular,  Cytogen's business is subject to a
number of significant risks, which include,  but are not limited to: the risk of
obtaining  additional  capital;  the risk of obtaining the necessary  regulatory
approvals; the risk of whether products result from development activities;  the
risk of  shifts  in the  regulatory  environment  affecting  sales of  Cytogen's
products such as third-party  payor  reimbursement  issues;  the risk associated
with Cytogen's  dependence on its partners for development of certain  projects,
as well as other  factors  expressed  from  time to time in  Cytogen's  periodic
filings with the Securities and Exchange  Commission  (the "SEC").  As a result,
this press release should be read in conjunction with Cytogen's periodic filings
with the SEC. The forward-looking  statements  contained herein are made only as
of the date of this press  release,  and Cytogen  undertakes  no  obligation  to
publicly update such forward-looking  statements to reflect subsequent events or
circumstances.

                                       ###







                       CYTOGEN CORPORATION & SUBSIDIARIES
                (All amounts in thousands except per share data)
                                   (Unaudited)

                 CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS


                                                                  THREE MONTHS ENDED                  NINE MONTHS ENDED
                                                                     SEPTEMBER  30,                     SEPTEMBER 30,
                                                            -----------------------------      -----------------------------
                                                                2005             2004              2005              2004
                                                            ------------     ------------      ------------     ------------
                                                                                                    
Product Revenue:
      QUADRAMET                                             $     1,991      $     1,924       $     6,198      $     5,394
      PROSTASCINT                                                 1,525            1,308             5,348            5,347
      Others                                                          -                -                 -                1
                                                            -----------      -----------       -----------      -----------
              Total Product Revenue                               3,516            3,232            11,546           10,742

License and Contract Revenue                                         35               29               155               72
                                                            -----------      -----------       -----------      -----------
              Total Revenues                                      3,551            3,261            11,701           10,814
                                                            -----------      -----------       -----------      -----------

Operating Expenses:
      Cost of Product Revenue                                     2,386            2,188             7,064            6,983
      Selling, General and Administrative                         6,740            5,343            20,456           14,148
      Research and Development                                    1,746              608             3,847            1,953
      Equity in Loss of Joint Venture                               677              805             2,879            2,156
                                                            -----------      -----------       -----------      -----------
              Total Operating Expenses                           11,549            8,944            34,246           25,240
                                                            -----------      -----------       -----------      -----------

Interest Income, Net                                                174               87               387              164
                                                            -----------      -----------       -----------      -----------
Net Loss                                                    $    (7,824)     $    (5,596)      $   (22,158)     $   (14,262)
                                                            ===========      ===========       ===========      ===========

Basic and Diluted Net Loss Per Share                        $     (0.44)     $     (0.36)      $     (1.36)     $     (0.99)
                                                            ===========      ===========       ===========      ===========

Weighted Average Common Shares Outstanding                       17,857           15,435            16,326           14,386
                                                            ===========      ===========       ===========      ===========






                      CONDENSED CONSOLIDATED BALANCE SHEETS

                                                                          SEPTEMBER 30,        DECEMBER 31,
                                                                               2005               2004
                                                                        -----------------    ---------------

                                                                                        
Assets:
      Cash, Cash Equivalents and Short-Term Investments                   $     23,467        $     35,825
      Accounts Receivable, Net                                                   1,606               1,406
      Inventories                                                                4,542               3,623
      Property and Equipment, Net                                                  847                 787
      QUADRAMET License Fee, Net                                                 6,501               7,024
      Other Assets                                                               1,893               1,748
                                                                          ------------        ------------
              Total Assets                                                $     38,856        $     50,413
                                                                          ============        ============

Liabilities and Stockholders' Equity:
      Accounts Payable and Accrued Liabilities                            $      6,163        $      7,644
      Other Current Liabilities                                                     18               2,692
      Long-Term Liabilities                                                         33                  47
      Stockholders' Equity                                                      32,642              40,030
                                                                          ------------        ------------
              Total Liabilities and Stockholders' Equity                  $     38,856        $     50,413
                                                                          ============        ============