A practical approach to borderline melanocytic neoplasms CAP TODAY Frontiers Case report: Exceptional disease progression in a 70 year old patient: generalized melanosis and melanuria in the course of metastatic melanoma a case study Melanoma metastasis Radiology Case Radiopaedia.org 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