colon mucosa-associated lymphoid tissue lymphoma (MONDO_0006154) is an extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue that arises from the colon. Also known as: MALT lymphoma of colon, MALT lymphoma of the colon, MALToma of colon, MALToma of the colon, colon MALT lymphoma, colon MALToma, colonic MALT lymphoma, colonic MALToma.