Melanoma primario de recto: una neoplasia infrecuente con una forma de presentación atípica / Primary melanoma of the rectum: an infrequent neoplasia with an atypical presentation

RESUMEN

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ABSTRACT

Primary anorectal melanoma is a rare malignancy with an extremely aggressive biological behaviour. The main clinical presentations are local symptoms such as rectal bleeding, anal mass or pain, or a change in bowel habits. The tumour is frequently mistaken for benign conditions as haemorrhoids or rectal polyps. Many treatments can be used surgery, chemotherapy, radiotherapy, immunotherapy and even biotherapy. Despite this, the disease has a very poor prognosis and 5 years