Primary anorectal melanoma—a rare entity: case report

Autor: Yves Couvreur, Robert De Keuleneer, Bernard Vanhoute, Konstantinos Kothonidis, F Maassarani
Rok vydání: 2017
Předmět:
Zdroj: Journal of Surgical Case Reports
ISSN: 2042-8812
DOI: 10.1093/jscr/rjx060
Popis: Anorectal melanoma is a rare disorder. There have only been a few cases reported and there is no consensus of treatment. We report a case of 50-year-old Caucasian man presenting intermittent prolapse of an anorectal mass during 6 months with occasional bleeding. Biopsies came up with the diagnosis of malignant melanoma. No distant metastases were found. He underwent an abdominoperineal resection due to internal sphincter invasion. A second tumour was diagnosed in final histologic examination: a dysplastic rectal polyp invaded by the melanoma (collision tumour). At 12 months of follow up he presented loco-regional recurrence (a single pelvic lymph node) and hepatic metastases. He was included in a study protocol comparing new medical treatments (nivolumab versus ipilimumab or both).
Databáze: OpenAIRE