small intestinal mucosa-associated lymphoid tissue lymphoma (Monarch Disease Ontology entry MONDO_0006420) is a mucosa-associated lymphoid tissue lymphoma (MALT) that arises from the small intestine. The morphologic characteristics are similar to those seen in gastric MALT lymphomas, with the exception of the lymphoepithelial lesions that are less prominent in the small intestine. Also known as: MALT lymphoma of small bowel, MALT lymphoma of small intestine, MALT lymphoma of the small bowel, MALT lymphoma of the small intestine, MALToma of small bowel, MALToma of small intestine, MALToma of the small bowel, MALToma of the small intestine.