Ninety-two cases of Hodgkin's disease (HD) in patients with HIV infection have been collected by the Italian Cooperative Group on AIDS and Tumors (G.I.C.A.T.). In accordance with the epidemiology of HIV infection in Italy, 82% were intravenous drug users (IVDU), 8% homosexual men, 5% IVDU+homosexuals and 5% heterosexuals. At diagnosis of HD, 16% had AIDS, 20% AIDS related complex (ARC), 33% persistent generalized lymphadenopathy (PGL) and 31% were asymptomatic. Fifty-three percent of the patients had stage IV disease and 70% mixed cellularity and lymphocytic depletion. Forty-six patients were treated with MOPP or MOPP [symbol: see text] ABVD +/- radiotherapy (zidovudine was not given) with complete remission (CR) in 54% and partial remission (PR) in 46% of the patients. Fifty-six percent of these patients developed opportunistic infections (OI) during therapy or follow-up. Sixteen patients were treated with epirubicin, bleomycin and vinblastine (EBV) and concomitant zidovudine, with CR in 44% and PR in 38%. However, only one of these patients developed OI during therapy or follow-up. The clinico-pathological features and natural history of HD in HIV setting are peculiar and quite distinct from those observed in HD in the general population. Better combined chemotherapy and antiretroviral therapy is needed in order to ameliorate the CR rate and decrease the OI in patients with HIV infection and HD.