Gastrointestinal manifestations of Malignant Melanoma – Observations from a single center study

Background: Gastrointestinal manifestation of malignant melanoma (GMM) is a rare entity. It usually occurs as a metastasis of extra-intestinal malignant melanoma (MM), but rarely no primary tumor can be detected. Histopathological differentiation from other gastrointestinal (GI) malignant tumors is challenging. Methods: All GMM cases diagnosed between 2004 and 2014 were retrieved from the histopathological database of the 1st Department of Pathology and demographic, clinical and pathological parameters were analyzed. Results: During the 11-year study period 14 GMM cases were found. In 4 cases, despite extensive…