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 A practical approach to borderline melanocytic neoplasms CAP TODAY Malignant melanotic nerve sheath tumors in the spinal canal of psammomatous and non psammomatous type: Two case reports Pigmented Lesions of the Central Nervous System: Radiologic Pathologic CorrelationRadioGraphics