Silvia Martín-Batista,Sunil Lakhwani,Patricia Machado-Machado,María José Rodríguez-Salazar,Miguel T. Hernández,José María Raya-Sánchez, Mucosa-Associated Lymphoid-Tissue Lymphoma of the Descending Colon in a Patient with Blastocystis hominis Infection: A Case Report and Review of Literature Surgical Case Reports 2020 2613-5965 http://dx.doi.org/10.31487/j.SCR.2020.09.02 https://www.sciencerepository.org/mucosa-associated-lymphoid-tissue-lymphoma-of-the-descending-colon_SCR-2020-9-102 Abstract: Mucosa-associated lymphoid tissue (MALT) lymphoma is an extra nodal marginal zone B-cell lymphoma that has been associated with chronic infections. It affects especially stomach, but other organs of gastrointestinal tract can be also involved. Colon MALT lymphoma is a very rare disease. We report a case of large bowel MALT lymphoma diagnosed as a result of weight loss and positive occult fecal blood test. Blastocystis hominis infection was detected in fecal analysis. We hypothesize chronic parasitic infection could be related with the development of the lymphoma.Keywords: MALT lymphoma, gastrointestinal cancer, Blastocystis hominis