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KMID : 0356720160320050190
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Journal of the Korean Society of Coloproctology
2016 Volume.32 No. 5 p.190 ~ p.194
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Synchronous Primary Anorectal Melanoma and Sigmoid Adenocarcinoma
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Cho In-Ju
Kim Kyung-Jong
Lim Seung-Cheoul
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Abstract
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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.
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KEYWORD
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Melanoma, Adenocarcinoma, Anus, Rectum, Sigmoid colon
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