A practical approach to borderline melanocytic neoplasms CAP TODAY Metastatic melanoma Stock Image C056 0518 Science Photo Library Generalized Melanosis in Metastatic Malignant Melanoma: The Possible Role of DOPAquinone Metabolites Semantic Scholar 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 Malignant melanotic nerve sheath tumor with PRKAR1A, KMT2C and GNAQ mutations