Occupational exposure to pesticides and prognosis of diffuse large B-cell lymphoma: A cohort study.

1564Background: Professional use of pesticides is a risk factor for non-Hodgkin lymphoma. The main biological mechanisms of both pesticides and chemotherapy are genotoxicity and reactive oxygen species generation. Cellular adaptation among patients exposed to low doses of genotoxic and oxidative compounds may hinder chemotherapy efficiency in lymphoma patients. We aim to determine the influence of occupational exposure to pesticides on response to immuno-chemotherapy and survival of patients treated for Diffuse Large B Cell Lymphoma (DLBCL). Methods: The ProLyPhy study is a retrospective cohort of patients treated between 2010 and mid-2015, for DLBCL, with a least 2-year follow-up. The study took place in 6 hospitals of central southern France. We screened 404 patients with newly-diagnosed DLBCL treated with anthracycline-based immuno-chemotherapy (R-CHOP like). Occupational history was reconstructed for 244 patients. Occupational data were analysed with the Pestipop French job-exposure matrix to determin...