Lymphoma, B-Cell, Marginal Zone

**Definition:** Extranodal lymphoma of lymphoid tissue associated with mucosa that is in contact with exogenous antigens. Many of the sites of these lymphomas, such as the stomach, salivary gland, and thyroid, are normally devoid of lymphoid tissue. They acquire mucosa-associated lymphoid tissue (MALT) type as a result of an immunologically mediated disorder.

**Tree numbers:** - C04.557.386.480.150.570 - C15.604.515.569.480.150.570 - C20.683.515.761.480.150.570

**Synonyms:** - Lymphoma, Mucosa-Associated Lymphoid Tissue - MALT Lymphoma - Marginal Zone B-Cell Lymphoma - Mucosa-Associated Lymphoid Tissue Lymphoma - Lymphoma of Mucosa-Associated Lymphoid Tissue