<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM * THE
CONSOLIDATED BALANCE SHEETS AS OF DECEMBER 31, 1997 AND THE CONSOLIDATED
STATEMENTS OF OPERATIONS FOR THE YEAR ENDED DECEMBER 31, 1997 AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
*Identify the financial statement(s) to be referenced in the legend:
</LEGEND>
<RESTATED> 
<CIK> 0000725058
<NAME> CYTOGEN CORPORATION
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                       7,401,000
<SECURITIES>                                         0
<RECEIVABLES>                                4,640,000
<ALLOWANCES>                                 (576,000)
<INVENTORY>                                    443,000
<CURRENT-ASSETS>                               289,000
<PP&E>                                      17,869,000
<DEPRECIATION>                            (13,917,000)
<TOTAL-ASSETS>                              27,769,000
<CURRENT-LIABILITIES>                        7,615,000
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       512,000
<OTHER-SE>                                   9,471,000
<TOTAL-LIABILITY-AND-EQUITY>                27,769,000
<SALES>                                      5,252,000
<TOTAL-REVENUES>                            14,420,000
<CGS>                                                0
<TOTAL-COSTS>                                5,492,000
<OTHER-EXPENSES>                            40,206,000
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             601,000
<INCOME-PRETAX>                           (30,712,000)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                       (30,712,000)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                            (1,352,000)
<CHANGES>                                            0
<NET-INCOME>                              (32,064,000)
<EPS-PRIMARY>                                   (0.63)
<EPS-DILUTED>                                        0