[Anal malignant melanoma. Case report and literature review].

Objective: To present two cases of anorectal malignant melanoma as due to its non specific presentation and rarity they are often misdiagnosed like hemorrhoids.

Background: Anal melanomas are rare tumors that constitute less than 1% of the malignant colorectal tumors and represent both a diagnostic and therapeutic challenge to physicians. They are generally pigmented but could be amelanotic in 29% of the cases and they are associated with poor prognosis, regardless of the surgical procedure used.