Late onset metastatic melanoma arising from a medium sized congenital melanocytic naevus Indian Journal of Dermatology, Venereology and Leprology 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 Decoding Melanoma Metastasis Malignant melanotic nerve sheath tumor Radiology Reference Article Radiopaedia.org Intracranial Metastatic Melanoma Decoding Melanoma Metastasis