The clinical and laboratory records of 13 patients with HIV-related lymphomas diagnosed between 1983 and 1987 are reviewed. 8 cases were classified as high-grade Non-Hodgkin-lymphomas (NHL), 4 as low-grade NHL (including 2 plasmocytomas), and one as Hodgkin's disease (HD). 11 of the 12 NHL were of the B-cell lineage. The mean patient's age was 39 years. At initial staging evaluation extranodal disease was present in 10 patients, in one of them as primary central nervous system (CNS) lymphoma; 9 patients presented with stage III or stage IV involvement. 9 patients were eligible for multidrug chemotherapy. In 5 cases an initial complete remission (CR) was observed, followed, however, by CNS relapse within a few months in 3 patients. 3 patients did not respond to chemotherapy and died within 4 to 6 weeks. Of the 9 patients treated chemotherapeutically, 5 died within 1 to 5 months, 1 is still alive in CR and 3 are still alive in partial remission (PR).