Inclusion Criteria:  patients over 18 years-old with of Marginal Zone Lymphoma and other B-cell chronic lymphoid malignancies patients that gave their informed consent for the conservation of blood or bone marrow cells (primary objective 1) patients that gave their informed consent for the retrospective use of their clinical and biological data  Exclusion Criteria:  patients under guardianship or curatorship patients who did not gave their consent for the use of their cells and/or data