<prompt> Melanoma of anal canalPresents with bleedingAP resection gives better result then local excisionLocal recurrence at same siteRadiosensitive  <response>: Malignant melanoma of the anus is very rare and usually presents as a bluish-black soft mass that may mimic a thrombosed external pile, although it may be amelanotic.The prognosis, irrespective of treatment, is extremely poor. Ref: Bailey Love;s Sho Practice of Surgery,E25,Page-1269 