Exhibit 21

                      Subsidiaries of CYTOGEN Corporation


Cellcor, Inc., a Delaware corporation, is a wholly-owned subsidiary of CYTOGEN
Corporation.

CytoRad Acquisition Corp., a Delaware corporation, is a wholly-owned subsidiary
of CYTOGEN Corporation.

CYTOGEN UK Limited, a private limited company organized under the laws of the 
United Kingdom, is a wholly-owned subsidiary of CYTOGEN Corporation.