Introduction:

Anorectal melanoma is an infrequent tumor characterized by aggressive and poor prognosis; it constitutes 1% among colorectal malignancies. It is more frequent in female patients over 50 years of age and reaches a maximum peak in the eighth decade of life.

Objective:

To present the clinical characteristics of a patient with melanoma of the anorectal canal.

Clinical case:

A 61-year-old female patient was studied, who came to the gastroenterology department for constipation of several months of evolution, associated with rectal tenesmus, anorexia, asthenia and rapid and progressive weight loss. He was diagnosed with anorectal melanoma, in advanced stage of the disease, for which he had poor evolution.

Conclusions:

With a thorough anamnesis and physical examination, associated with the use of the available diagnostic means and a high index of suspicion, it is achieved with the patient, that the study and diagnosis were made promptly and thus impose treatment.

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