content: <PAGE>
                                                                  Conformed
                                                                     Copy    
  
  
  
  
                                  
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549
                                  
                                  
                                    FORM 8-K
                                  
                                 CURRENT REPORT
                                  
                        Pursuant to Section 13 or 15(d)
                    of the Securities Exchange Act of 1934
                                  
                                  
        Date of Report (Date of earliest event reported): May 22, 1998
                                                          ------------
                    
                              CYTOGEN CORPORATION               
            ------------------------------------------------------
            (Exact name of registrant as specified in its charter)
                                  
                                  
      Delaware                 333-02015                22-2322400 
  ---------------             -----------             -------------
  (State or other             (Commission             (IRS Employer
  jurisdiction of               File No.)          Identification No.)
  Incorporation or
  Organization)
  
  
     600 College Road East, CN 5308, Princeton, New Jersey     08540-5308   
    -----------------------------------------------------------------------
          (Address of principal executive offices)              (Zip Code)    
                                  
                                  
      Registrant's telephone number, including area code: (609) 987-8200
                                  
  
  
  <PAGE>
  
  Item 5.  Other Events.
           -------------
  
       On May 22, 1998, CYTOGEN Corporation issued the attached press release.
  
  Item 7.  Exhibits.
           ---------
  
  99.1     Press release issued by CYTOGEN Corporation on May 22, 1998
  
  
  
  
  
  
  
                                     2
  
  
  
  <PAGE>
  
                               SIGNATURES
  
                                  
       Pursuant to the requirements 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.
  
                                     CYTOGEN CORPORATION
  
  
  
                                By   /s/ John E. Bagalay, Jr.       
                                     ---------------------------
                                  Name:  John E. Bagalay, Jr.
                                  Title: President and Chief Executive Officer
  
       
  Date: May 22, 1998 
  
  
  
  
  
                                     3
  
  <PAGE>
  
  
  
                              EXHIBIT INDEX
                                  
                                  
  Number                        Description                             Page
  
   99.1        Press Release issued by CYTOGEN Corporation on 
               May 22, 1998                                               5
  
  
  
  
  
  
                                    4
metadata_documents: [{"type": "8-K", "sequence": "1", "secsgml_size_bytes": 3137}]
metadata_filer: {"company-data": {"conformed-name": "CYTOGEN CORP", "cik": "0000725058", "assigned-sic": "2835", "irs-number": "222322400", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "333-02015", "film-number": "98630684"}, "business-address": {"street1": "600 COLLEGE RD EAST CN 5308", "city": "PRINCETON", "state": "NJ", "zip": "08540", "phone": "6099878200"}, "mail-address": {"street1": "600 COLLEGE RD EAST CN 5308", "street2": "600 COLLEGE RD EAST CN 5308", "city": "PRINCETON", "state": "NJ", "zip": "08540"}}
text: Conformed
                                                                     Copy    
  
                                  
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549
                                  
                                  
                                    FORM 8-K
                                  
                                 CURRENT REPORT
                                  
                        Pursuant to Section 13 or 15(d)
                    of the Securities Exchange Act of 1934
                                  
                                  
        Date of Report (Date of earliest event reported): May 22, 1998
                                                          ------------
                    
                              CYTOGEN CORPORATION               
            ------------------------------------------------------
            (Exact name of registrant as specified in its charter)
                                  
                                  
      Delaware                 333-02015                22-2322400 
  ---------------             -----------             -------------
  (State or other             (Commission             (IRS Employer
  jurisdiction of               File No.)          Identification No.)
  Incorporation or
  Organization)
  
     600 College Road East, CN 5308, Princeton, New Jersey     08540-5308   
    -----------------------------------------------------------------------
          (Address of principal executive offices)              (Zip Code)    
                                  
                                  
      Registrant's telephone number, including area code: (609) 987-8200
  Item 5.  Other Events.
           -------------
  
       On May 22, 1998, CYTOGEN Corporation issued the attached press release.
  
  Item 7.  Exhibits.
           ---------
  
  99.1     Press release issued by CYTOGEN Corporation on May 22, 1998
  
                                     2
  SIGNATURES
  
                                  
       Pursuant to the requirements 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.
  
                                     CYTOGEN CORPORATION
  
                                By   /s/ John E. Bagalay, Jr.       
                                     ---------------------------
                                  Name:  John E. Bagalay, Jr.
                                  Title: President and Chief Executive Officer
  
       
  Date: May 22, 1998 
  
                                     3
  EXHIBIT INDEX
                                  
                                  
  Number                        Description                             Page
  
   99.1        Press Release issued by CYTOGEN Corporation on 
               May 22, 1998                                               5
  
                                    4