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Synchronous Primary Anorectal Melanoma and Sigmoid Adenocarcinoma

대한대장항문학회지 2016년 32권 5호 p.190 ~ 194
 ( Cho In-Ju ) - Chosun University School of Medicine Department of Pathology

 ( Kim Kyung-Jong ) - Chosun University School of Medicine Department of Surgery
 ( Lim Sung-Chul ) - Chosun University School of Medicine Department of Pathology

Abstract


A primary anorectal malignant melanoma is a rare tumor. Moreover, cases involving a synchronous anorectal melanoma and colon adenocarcinoma are extremely rare. The authors report a case of a synchronous anorectal melanoma and sigmoid adenocarcinoma in an 84-year-old man. The regions of the anorectal melanoma showed melanocytic nevi in the adjacent mucosa of the anal canal and rectum. A dysplastic nevus was also identified in the anal mucosa. This case demonstrates that an anorectal melanoma can arise from pre-existing anorectal melanocytic lesions.

키워드

Melanoma; Adenocarcinoma; Anus; Rectum; Sigmoid colon
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