Phase I-II study of radiolabeled antibody integrated in the treatment of primary hepatic malignancies

Primary intrahepatic malignancies have been demonstrated to contain tumor associated antigens which bind radiolabelled anti-CEA and anti-ferritin antibodies. The present study reports the toxicity and possible therapeutic efficacy of radiolabelled antibodies that were administered at 50 and 100 millicurie doses following combination radiation and chemotherapy. Three of 10 patients who entered into the study completed therapy on schedule and have had remissions of 7, 9, and 18 months; 2 of the 3 patients were alive at 1 and 2 years after treatment. Of 5 patients who were administered radioimmunoglobulin, the singular toxicity was 3 weeks of marrow hypoplasia in one patient who susequently recovered. The remaining 5 patients were at various stages of protocol treatment prior to immunoglobulin treatment. Eight of the 10 patients have had computer analysis of sequential computerized axial tomography (CAT) scans obtained during the course of therapy and at follow up examination. No major organ toxicity was noted. Clinical remissions were documented by computer analysis of the CAT scans to determine the percent of residual tumor.