Primary Amelanotic Anorectal Melanoma with Upper Gastrointestinal and Brain Metastases

ConclusionPrimary anorectal melanoma is a rare aggressive malignancy with a tendency to metastasize early, due to its abundant vascular system, although metastasis to the stomach and duodenum is rare. The diagnosis of melanoma is based on the histological features and immunohistochemical stains.
Source: Hellenic Journal of Surgery - Category: Surgery Source Type: research