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 Diffuse melanosis cutis: a rare manifestation of metastatic melanoma BMJ Case Reports Pigmented Lesions of the Central Nervous System: Radiologic Pathologic CorrelationRadioGraphics Malignant melanotic nerve sheath tumors in the spinal canal of psammomatous and non psammomatous type: Two case reports Intracranial metastatic melanoma Radiology Reference Article Radiopaedia.org