Malignant Melanoma of the Gall Bladder, A Case report and Literature Review.

Malignant melanoma is a highly unpredictable tumor, which can metastasize to any organ, including the gallbladder in 4–20% . Grossly and histologically, the distinction between primary and secondary lesions can be difficult to differentiate because they share many similar characteristics . Melanoma involving the biliary tree seldom causes relevant symptoms during life, and that is why few cases are reported in the literatures 2 and those documented in living patients are even fewer . Herein, we present a case of a 75-year-old female with metastatic melanoma to the gallbladder and a brief review of the literatures.