Picture of an anorectal melanoma after abdomino-pereneal rectum-exstirpation in a 55-year old male patient.
Source: Sarah Liptrot, David Semeraro, Adam Ferguson and Nicholas Hurst: Malignant melanoma of the rectum: a case report. In: Journal of medical case reports. Band 3, 2009, S. 9318, PMID 20062747. PMC 2803841 [1]