[Merkel cell carcinoma in unusual location].

We present a case of Merkel cell carcinoma with buttock location at a 70 years old patient. In literature there are described about 600 observations, of which more than half located in the head and neck. Despite early diagnosis--less than five months after occurrence--a thorough exploration (ultrasonography of soft tissues, pelvi-abdominal CT, histopathological and immunohistochemical examination), correct treatment (broad surgical exeresis, local postoperative radiotherapy) and appropriate follow-up, the patient had a negative evolution. Death occurs 17 months after diagnosis by the occurrence of liver metastases, invading the hepatic hilum and hence jaundice.