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Introduction

Pigneux: Roche: Consultancy, Research Funding; BMS Celgene: Consultancy, Research Funding; Sunesis: Consultancy, Research Funding; Amgen: Consultancy; Novartis: Consultancy, Research Funding. Forcade: Novartis: Other: travel grant. Mohty: Pfizer: Honoraria; Novartis: Honoraria; Takeda: Honoraria; Jazz: Honoraria, Research Funding; Janssen: Honoraria, Research Funding; Gilead: Honoraria; Celgene: Honoraria, Research Funding; Bristol Myers Squibb: Honoraria; Astellas: Honoraria; Amgen: Honoraria; Sanofi: Honoraria, Research Funding; Adaptive Biotechnologies: Honoraria. Dulery: Novartis: Honoraria; Takeda: Consultancy; Gilead: Other: Travel support and registration fees for scientific meetings .

Thieblemont: Cellectis: Speakers Bureau; Roche, Amgen, Kyte Gilead, Celgene, Abbvie, Novartis, Cellectis: Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Travel support; Roche, Hospita: Research Funding.Rituximab used in treated patients

Background. Splenic Marginal Zone Lymphoma (SMZL) is a rare indolent B-cell lymphoma characterized by a massive splenomegaly and a moderate lymphocytosis. There is no standard of care for SMZL so far. The treatment is indicated if constitutional symptoms, massive splenomegaly and/or cytopenia, after a watch and wait period that is highly variable. Rituximab with or without chemotherapy, chemotherapy, and splenectomy are valid treatment approaches. Our objectives were to describe the characteristics of the patients with SMZL retrospectively collected from a French population database, to analyze the treatments received in first line (Tt1) and in second line (Tt2) in term of efficacy, and to describe their outcome.