A Rare Case of Aggressive Melanotic Schwannoma Occurred in Spinal Nerve of a 59 Year Old Male Malignant Melanoma Clinical Pathology Flashcards ditki medical and biological sciences Melanoma metastasis: new concepts and evolving paradigms Oncogene Metastatic melanoma Melanoma, Melanotic neuroectodermal tumor and other cutaneous pigmented Download Scientific Diagram This is a very rare case of metastatic oral mucosal melanoma to the colon with an unusual presentation mimicking melanosis coli. The colonoscopy findings show no mass effect but multiple hyperpigmented lesions