Synchronous Primary Anorectal Melanoma and Sigmoid Adenocarcinoma.
- Author:
Inju CHO
1
;
Kyung Jong KIM
;
Sung Chul LIM
Author Information
- Publication Type:Case Report
- Keywords: Melanoma; Adenocarcinoma; Anus; Rectum; Sigmoid colon
- MeSH: Adenocarcinoma*; Aged, 80 and over; Anal Canal; Colon; Colon, Sigmoid*; Dysplastic Nevus Syndrome; Humans; Melanoma*; Mucous Membrane; Nevus, Pigmented; Rectum
- From:Annals of Coloproctology 2016;32(5):190-194
- CountryRepublic of Korea
- Language:English
- 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.
