Extranodal Marginal Zone Lymphoma of Mucosa-Associated Lymphoid Tissue Involving the Digestive System

**Semantic type:** Neoplastic Process

**Definition:** An extranodal low-grade B-cell non-Hodgkin lymphoma arising in mucosal or glandular tissues of the digestive system. It recapitulates the cytoarchitectural features of mucosa-associated lymphoid tissue (MALT). It is composed of small lymphoid cells, often including marginal zone cells. (WHO 2019)

**Synonyms:** - Mucosa-Associated Lymphoid Tissue Lymphoma Involving the Digestive System