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Multi-Database Description of Primary Splenic Diffuse Large B-Cell Lymphoma.
Anticancer Research 2017 December
BACKGROUND/AIM: Stage I splenic diffuse large B-cell lymphoma (DLBCL) is rare and there are few data to guide management. We sought to further define prognosis and outcomes.
MATERIALS AND METHODS: We utilized the Surveillance, Epidemiology, and End Results registry to identify patients with stage I splenic DLBCL diagnosed 1973-2013. Patients were divided into two cohorts based on the year of diagnosis (1983-2005; 2006-2013) as rituximab was approved by the U.S. Food and Drug Administration in 2006 for first-line treatment of DLBCL.
RESULTS: Utilization of splenectomy decreased after the approval of rituximab (82% pre- versus 72% rituximab-era). Disease-specific and overall survival were greater with splenectomy [hazard ratio (HR)=0.57, p=0.04; and HR=0.66, p=0.03, respectively], but this benefit was only seen in the pre-rituximab cohort, not in the rituximab-era cohort. There was a trend toward improved overall survival with the introduction of rituximab (HR=0.75, p=0.054).
CONCLUSION: Utilization of splenectomy for stage I splenic DLBCL has decreased with the introduction of rituximab without compromising outcomes.
MATERIALS AND METHODS: We utilized the Surveillance, Epidemiology, and End Results registry to identify patients with stage I splenic DLBCL diagnosed 1973-2013. Patients were divided into two cohorts based on the year of diagnosis (1983-2005; 2006-2013) as rituximab was approved by the U.S. Food and Drug Administration in 2006 for first-line treatment of DLBCL.
RESULTS: Utilization of splenectomy decreased after the approval of rituximab (82% pre- versus 72% rituximab-era). Disease-specific and overall survival were greater with splenectomy [hazard ratio (HR)=0.57, p=0.04; and HR=0.66, p=0.03, respectively], but this benefit was only seen in the pre-rituximab cohort, not in the rituximab-era cohort. There was a trend toward improved overall survival with the introduction of rituximab (HR=0.75, p=0.054).
CONCLUSION: Utilization of splenectomy for stage I splenic DLBCL has decreased with the introduction of rituximab without compromising outcomes.
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