disease has location spleen cancer gastric mucosa-associated lymphoid tissue lymphoma primary MALT lymphoma of the stomach MALToma of stomach MALT lymphoma of the stomach primary gastric MALT lymphoma GARD:0024340 NCIT:C5266 UMLS:C1333782 gastric MALT lymphoma primary MALT lymphoma of stomach MALToma of the stomach primary gastric B-cell MALT lymphoma MEDGEN:232547 MONDO:0006226 A low grade, indolent B-cell lymphoma, usually associated with Helicobacter pylori infection. Morphologically it is characterized by a dense mucosal atypical lymphocytic (centrocyte-like cell) infiltrate with often prominent lymphoepithelial lesions and plasmacytic differentiation. Approximately 40% of gastric MALT lymphomas carry the t(11;18)(q21;q21). Such cases are resistant to Helicobacter pylori therapy. MALT lymphoma of stomach gastric MALToma stomach MALT lymphoma gastric mucosa-associated lymphoid tissue lymphoma EFO:1000274 MALT lymphoma hereditary gastric cancer gastric non-hodgkin lymphoma stomach