Survival and consolidative radiotherapy in patients living with HIV and treated for diffuse large B-cell lymphoma.

OBJECTIVES: Current guidelines tend to treat HIV positive (HIV+) patients as their seronegative counterparts with diffuse large B-cell lymphoma (DLBCL) but little is known about their radiotherapy responses differences. PATIENTS AND METHODS: A retrospective cohort of all consecutive HIV+ DBCL patients treated with chemotherapy between 2004 and 2018 was assessed. All patients had biopsy-proven lymphomas. They were included if the proposed radical treatment was done without progression or death during chemotherapy and had at least 6 months of follow-up or were followed until death. RESULTS: Fifty-three (53) patients were selected, with a median age at diagnosis of 41.39 years (20-65 years). Median follow-up of 35.16 months (1.4-178.7 months). Male patients accounted for 54.7% and most had a good performance in the ECOG scale at diagnoses (81.1% are ECOG 0-1). Median overall survival was not reached. Mean OS was 41.5 months with 16 deaths. Age had an impact on OS, with patients older than 60 years at more risk (p = 0.044), as did longtime use of HAART, with those that started antiretroviral therapy within the diagnose of the lymphoma at greatest risk (p = 0.044). RT did not have an impact on OS (p = 0.384) or PFS (p = 0.420), although survival curves show better OS in the radiotherapy group. Toxicities were rare, since none of the patients had grade 3 or superior toxicity. CONCLUSION: RT did not impact survival or progression in our limited sample, but a longer OS may occur after the first-year post RT. RT should be tested in prospective data in the HIV+ population with DLBCL.