Radiotherapy in Adult Burkitt Lymphoma: A Retrospective Analysis in a Large University Center.

Radiotherapy is not usually a part of standard Burkitt lymphoma treatment. We aim to assess patient and treatment characteristics of Burkitt lymphoma, particularly RT use, and how they relate to survival. Retrospective cohort of adult patients treated from 2008 to 2019 in an academic hospital. All patients had biopsy-proven Burkitt's lymphoma staged I to IV according to St. Jude's/Murphy staging system. Patients were followed for at least six-months or until death. Forty-eight consecutive patients were selected. Median age at diagnosis was 36.9 years (18-62). Median follow-up was 7.78 months (0.5-187.5). Most were male (81.3%) and had good performance by ECOG scale on their first hematologist appointment (56.2% were ECOG 0). Median OS and PFS were 8.4 months (interquartile range Q1-Q3: 3.96-152.2) and 8.3 months (interquartile range Q1-Q3: 6.7-not reached), respectively, with 32 deaths. A total of 43 patients (89.6%) were HIV-positive and had a median CD4 + level of 193.5 cells/mm 3 at diagnosis. Patients that did not present a drop in CD4 + levels after treatment had better OS than those that did ( p  = 0.020). 11 patients underwent radiotherapy (22.9%) who had better OS than those who did not ( p  = 0.015). Our findings show that adult patients living with HIV presenting Burkitt lymphoma who maintained their immune status throughout treatment had better prognosis than those who presented CD4 + cells drops. Also, patients treated with radiotherapy-either with palliative intent or as consolidation after chemotherapy-had statistically significant better OS than those not irradiated. Prospective data is warranted for radiotherapy as a consolidative and as a palliative treatment.