Seventy-eight patients with Hodgkin's disease were treated with radiation therapy between July 1966 and July 1976 (30 Stage I, 28 Stage II, 20 Stage III). The mean follow-up period is greater than 5 years. 90% of Stage I, 86% of Stage II, 65% of Stage III, and 82% (64/78) of all patients are NED after radiotherapy alone. Since laparotomy option (1970) 89% (50/56) of patients are NED. Fourteen patients were failures. Chemotherapy "rescued" 6 of 14. Seven have died, 1 is alive with disease, and 1 died of leukemia. Absolute survival is 90% (70/78). Failures were more frequent in patients with unfavorable histological types (9/14), and Stage III disease, primarily IIIS+ or B category (7/14). Sites of failures were mainly extranodal, primarily lung (10/14) and bone (2/14), and are consistent with hematogenous dissemination. Laparotomy performed in 41 patients identified unsuspected splenic involvement in 9 cases (22%), but was a distinct failure in confirming most "small node" positive lymphangiograms. Two patients developed acute myelocytic leukemia, both while NED 5 years posttherapy. One patient had also received adjunctive MOPP. There has been no impairment in the quality of survival that could be directly attributed to radiotherapy.