Intraoperative discovery of melanosis coli during emergent bowel resection for perforation BMJ Case Reports Abuse of laxatives and melanosis coli Melanosis coli Wikipedia 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 Melanosis Coli Gastroenterology & Hepatology of CNY Colon Polyps: ICD 10 Coding AAPC Knowledge Center