“…Anorectal melanoma (ARM) is an extremely rare malignancy, which accounts for only 0.5%–4.6% of all malignant anorectal neoplasms and 1.4% of all melanomas 1 2 . ARM is usually polypoid and often melanotic 3 4 . Amelanotic ARMs may be misdiagnosed as polyps or adenocarcinomas, which may contribute to their poor prognosis because of their highly aggressive potential.…”