Gastric Non-Hodgkin Lymphoma

**Semantic type:** Neoplastic Process

**Definition:** An extranodal non-Hodgkin lymphoma that arises from the stomach with the bulk of the mass located in the stomach. The vast majority of cases are diffuse large B-cell lymphomas and B-cell lymphomas of the mucosa-associated lymphoid tissue.

**Synonyms:** - Gastric Non-Hodgkin's Lymphoma - Non-Hodgkin's Lymphoma of Stomach - Non-Hodgkin's Lymphoma of the Stomach - Primary Gastric Non-Hodgkin Lymphoma - Primary Gastric Non-Hodgkin's Lymphoma