Association of Occupational Pesticide Exposure With Immunochemotherapy Response and Survival Among Patients With Diffuse Large B-Cell Lymphoma.

Importance: Professional use of pesticides is a risk factor for non-Hodgkin lymphoma. The main biological mechanisms of pesticides and chemotherapy are genotoxicity and reactive oxygen species generation. Cellular adaptation among patients exposed to low doses of genotoxic and oxidative compounds might hinder chemotherapy efficiency in patients with lymphoma. Objective: To examine the association of occupational exposure to pesticides with immunochemotherapy response and survival among patients treated for diffuse large B-cell lymphoma. Design, Setting, and Participants: This retrospective cohort study assessed patients treated from July 1, 2010, to May 31, 2015, for diffuse large B-cell lymphoma, with a 2-year follow-up. The study took place at 6 university and nonuniversity hospitals in Languedoc-Roussillon, France. A total of 404 patients with newly diagnosed diffuse large B-cell lymphoma treated with anthracycline-based immunochemotherapy were included before the study began. Occupational history was reconstructed for 244 patients and analyzed with the PESTIPOP French job-exposure matrix to determine likelihood of occupational exposure to pesticides. Analysis of the data was performed from July 15, 2017, to July 15, 2018. Main Outcomes and Measures: Treatment failure (ie, partial response, stable disease, disease progression, or interruption for toxic effects) rate, 2-year event-free survival, and overall survival between exposed and nonexposed patients after adjustment for confounding factors. Results: A total of 244 patients (mean [SD] age, 61.3 [15.2] years; 153 [62.7%] male) had complete occupational data. Of these patients, 67 (27.4%) had occupational exposure to pesticides, with 38 exposed through agricultural occupations. Occupational exposure was not associated with clinical and biological characteristics at diagnosis. Occupationally exposed patients had a significantly higher treatment failure rate (22.4% vs 11.3%; P = .03; adjusted odds ratio [AOR] for confounding factors, 3.0; 95% CI, 1.3-6.9); this difference was higher among patients with exposing agricultural occupations compared with other patients (29.0% vs 11.7%; AOR, 5.1; 95% CI, 2.0-12.8). Two-year event-free survival was 70% in the occupationally exposed group vs 82% in the unexposed group (adjusted hazard ratio [AHR] for confounding factors, 2.2; 95% CI, 1.3-3.9). Among patients with exposing agricultural occupations compared with other patients, the difference was more pronounced (2-year event-free survival, 56% vs 83%; AHR, 3.5; 95% CI, 1.9-6.5). Similarly, 2-year overall survival was lower in the group of patients with exposing agricultural occupations compared with other patients (81% vs 92%; AHR, 3.9; 95% CI, 1.5-10.0). Conclusions and Relevance: This retrospective study showed that agricultural occupational exposure to pesticides was associated with treatment failure, event-free survival, and overall survival among patients with diffuse large B-cell lymphoma.

Infectious complications, prognostic factors and assessment of anti-infectious management of 212 consecutive patients with acute pancreatitis.

AIM: Acute pancreatitis is an important cause of morbidity and mortality, mainly due to sepsis. The aim of this study was to determine the incidence of infectious complications and their impact on mortality in patients hospitalized for acute pancreatitis. PATIENTS AND METHODS: Patients admitted for acute pancreatitis were retrospectively included within a period between 1995 and 2000. Incidence of abdominal and extra-abdominal sepsis and specific care were specifically analyzed. Risk factors for death were evaluated by uni- and multivariated analysis. RESULTS: Two hundreds and twelve consecutive patients (128 males, median age 54 years) were included. Mortality was 10.8%. At least one infectious episode was collected in 25% of the patients with an abdominal sepsis (26.8%), bacteriemia (24.4%), respiratory (24.4%) and urinary tracts (19.5%) infections. Infection was polymicrobial in 37.5%. An antibiotic prophylaxis was administered in 10.8%, more often in patients with severe pancreatitis. It did not alter mortality or incidence of infections but significantly delayed occurrence of sepsis. Mortality of patients treated with more than one line of antibiotics was higher. However in this study infectious complications were not an independent factor for mortality. CONCLUSION: Infections are frequent and polymicrobial but are not an independent prognostic factor during acute pancreatitis.