title: Mucosa-Associated Lymphoid-Tissue Lymphoma of the Cecum and Rectum: A Case Report.
abstract: 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 forHelicobacter pyloriinfection 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.
authors.affiliation: Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea.
authors.forename: Myung Jin
authors.initials: MJ
authors.lastname: Nam
authors.affiliation: Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea.
authors.forename: Byung Chang
authors.initials: BC
authors.lastname: Kim
authors.affiliation: Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea.
authors.forename: Sung Chan
authors.initials: SC
authors.lastname: Park
authors.affiliation: Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea.
authors.forename: Chang Won
authors.initials: CW
authors.lastname: Hong
authors.affiliation: Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea.
authors.forename: Kyung Su
authors.initials: KS
authors.lastname: Han
authors.affiliation: Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea.
authors.forename: Dae Kyung
authors.initials: DK
authors.lastname: Sohn
authors.affiliation: Center for Prostate Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea.
authors.forename: Weon Seo
authors.initials: WS
authors.lastname: Park
authors.affiliation: Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea.
authors.forename: Hee Jin
authors.initials: HJ
authors.lastname: Chang
authors.affiliation: Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea.
authors.forename: Jae Hwan
authors.initials: JH
authors.lastname: Oh
keywords: Cecum; Colonoscopy; MALT lymphoma; Rectum