Mucosa-Associated Lymphoid-Tissue Lymphoma of the Cecum and Rectum: A Case Report

• Published in: Annals of coloproctology Vol. 33; no. 1; pp. 35 - 38
• Main Authors: Nam, Myung Jin, Kim, Byung Chang, Park, Sung Chan, Hong, Chang Won, Han, Kyung Su, Sohn, Dae Kyung, Park, Weon Seo, Chang, Hee Jin, Oh, Jae Hwan
• Format: Journal Article
• Language: English
• Published: Korea (South) The Korean Society of Coloproctology 01.02.2017; 대한대장항문학회
• Subjects: Case Report; 일반외과학; MALT lymphoma; Cecum; Colonoscopy; Rectum
• ISSN: 2287-9714; 2287-9722
• DOI: 10.3393/ac.2017.33.1.35

A colonic mucosa-associated lymphoid-tissue (MALT) lymphoma is relatively rare compared to lymphomas of the stomach or small intestine. We present a case of a MALT lymphoma in the cecum and rectum found during screening colonoscopy. A 54-year-old female, who had undergone right-breast-conserving surgery with axillary dissection due to an invasive ductal carcinoma and a left-breast excisional biopsy due to microcalcification following adjuvant chemoradiation therapy 3 years earlier, was found to have 3-mm-sized smooth elevated lesions in both the cecum and rectum. No pathologic lesion or lymphadenopathy was found at any other site, but chronic gastritis negative for infection was found. The polyps were removed by using an endoscopic biopsy and revealed an extra nodal marginal zone B-cell MALT lymphoma, showing positive for CD3 and CD20 by immunohistochemical staining. The patient underwent close observation without any additional treatment and has shown no evidence of recurrence as of her last visit.