Annals of Coloproctology

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Case Report

Malignant disease,Colorectal cancer

Synchronous Quadruple Colon Cancer With Two Lesions Previously Obscured by Ischemic Colitis, Plus Bladder Cancer and Thymoma: A Case Report: Byung-Soo Park, Sung Hwan Cho, Su Jin Kim, Tae Un Kim, Dong Il Kim, Gyung Mo Son, Hyun Sung Kim; Ann Coloproctol. 2021;37(Suppl 1):S44-S47. Published online September 18, 2020; DOI: https://doi.org/10.3393/ac.2020.06.18

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Synchronous quadruple colorectal cancer (CRC) is extremely rare without genetic alterations. We present a case of synchronous quadruple CRC with 2 lesions previously obscured by ischemic colitis. A 73-year-old woman was admitted to our emergency department. An abdominal computed tomography revealed ischemic colitis and irregular wall thickening of the sigmoid colon and sigmoid-descending junction, suspicious of 2 colon cancers. A colonoscopy examination revealed a fungating mass 20 cm from the anal verge, as well as ischemic colitis spanning the mucosa from the sigmoid colon to the transverse colon. The patient underwent laparoscopic Hartmann procedure. Pathologic examination confirmed both lesions as adenocarcinomas with microsatellite stable. Seven months postoperatively, instead of a laparoscopic Hartmann reversal, a laparoscopic total colectomy was performed due to the continued presence of severe ischemic colitis. The pathologic report suggested the presence of 2 distinct invasive adenocarcinomas in the descending colon without genetic alterations such as microsatellite instability.

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