A rare presentation of melanoma as a retroperitoneal mass: A case report and a brief review of the literature

Malignant melanoma presenting as a retroperitoneal mass is a rare manifestation of this disease. Melanoma, a malignant tumor of melanocytes, is a form of skin cancer with about 160,000 new cases of melanoma yearly worldwide. More than 53,000 people in the United States are diagnosed with melanoma every year. We present a rare case of malignant melanoma presenting as a retroperitoneal mass.