HIV-RELATED LYMPHOMA IN A PUBLIC HOSPITAL IN CHILE. ANALYSIS OF 55 CASES Background: Cancer is the third cause of death in patients infected with human immunodeficiency virus (HIV) and lymphoma is the most common type. Aim: To describe the clinical characteristics, histology, risk factors and prognosis of these patients, in a Chilean public hospital in Chile. Material and methods: Records of  55 patients (45 males) aged between 23 and 67 years with lymphoma and  HIV positive serology, diagnosed between 1992-2008, were reviewed. Results: Six patients (11%) had Hodgkin lymphoma (HL) and the rest, non-Hodgkin lymphoma (NHL). B-cell phenotype constituted 83.7% of NHL cases. The most common subtype was diffuse large B cell lymphoma in 24 cases (49%), followed by Burkitt lymphoma in 12 cases (24.5%), T and T/NK cell lymphoma in 8 cases (16.3%) and plasmablastic lymphoma in 5 cases (10.2%). Thirty five patients (64%) underwent curative intended chemotherapy (CT) concomitantly with highly active antiretroviral therapy (HAART). Three year  survival of the whole cohort was 27%. By multivariate analysis, the most important prognostic factors for long term survival, were complete response  to CT, (p