Chemotherapy of Hodgkin's lymphoma with alternating cycles of COPP (cyclophosphamide, vincristin, procarbazine, prednisone) and ABVD (doxorubicin, bleomycin, vinblastine and dacarbazine). Results of the HD1 and HD3 trials of the German Hodgkin Study Group.

Untreated patients with Hodgkin’s lymphoma in stages I-IIIA with risk factors (large mediastinal mass, massive splenic involvement, extranodal disease) were entered into the HD1 protocol and received a combined chemoradiotherapy [2 × (COPP+ABVD) + 40 Gy extended field irradiation (EF) vs 2 × (COPP+ABVD) + 20 Gy EF]. Patients in stages IIIB/IV (HD3 protocol) received induction chemotherapy [3 × (COPP+ABVD)] and were randomized into consolidation by radiotherapy [20 Gy involved field irradiation (IF)] vs chemotherapy [1 × (COPP+ABVD)]. Seventy-three of 89 evaluable patients (82%) treated according to the HD1 protocol achieved a complete remission. Freedom from progression and survival of patients in stages I-IIIA with risk factors treated according to HD1 were no worse than those of patients in stages I and II without risk factors who received only radiotherapy. Eighty-six of 137 patients (63%) treated according to the HD3 protocol achieved complete remission after induction chemotherapy with COPP+ABVD. This is significantly better than the 31% complete remission rate observed in a previous pilot study with COPP alone (P 80 mm h−1) was the most significant risk factor for achieving freedom from progression.