Non-Hodgkin's Lymphoma among Patients Infected with Human Immunodeficiency Virus: The Experience of a Single Center in Brazil

Abstract

The relative risk of non-Hodgkin's lymphoma (NHL) among patients infected with human immunodeficiency virus (HIV) is elevated compared with the general population. We describe a retrospective study of 78 HIV-infected patients with NHL treated between 1999 and 2006 at the Infectology Institute, a reference center for HIV treatment in São Paulo, Brazil. All patients were treated with standard CHOP therapy (cyclophosphamide, doxorubicin, vincristine, and prednisone). An evaluation of treatment response was available for 48 (61.5%) of the patients who completed initial treatment. Twenty-three patients (47.9%) achieved a complete response (CR), 3 (6.3%) achieved a partial response, and 22 (45.8%) failed to respond to treatment. Of the 30 patients (38.5%) who were not available for response evaluation, 23 died of sepsis during treatment, 5 abandoned treatment, and 2 are still under treatment. After a median follow-up of 3 years, the overall survival rate for all patients is 20.5%. A univariate analysis showed a significant CR rate in patients with respect to the following factors: no acquired immunodeficiency syndrome (AIDS) diagnosis prior to the lymphoma, disease stage of I to II, and an International Prognostic Index (IPI) of low or low-intermediate risk. A multivariate analysis indicated that only a previous AIDS diagnosis and the IPI were significantly related to the CR rate. A median disease-free survival (DFS) time for the patients who achieved a CR was not reached, with a mean survival time of 73 months and a 3-year DFS rate of 77.5%. Our results provide additional information regarding HIV-related lymphoma in Brazil.