OBJECTIVES: I. Compare relapse-free survival and overall survival of patients with Stage III/IV Hodgkin's disease randomly assigned to adjuvant involved-field radiotherapy vs. no adjuvant therapy following remission induction with MOPP/ABV (nitrogen mustard/vincristine/procarbazine/prednisone/doxorubicin/bleomycin/vinblastine). II. Evaluate the therapeutic efficacy of MOPP/ABV hybrid chemotherapy in advanced Hodgkin's disease. III. Evaluate the prognostic significance of an early response to MOPP/ABV in patients with advanced Hodgkin's disease.