ICD 10 CM Coding of Colorectal Polyps An unusually pigmented colon The Lancet Gastroenterology & Hepatology 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 Quantitative Analysis of Melanosis Coli Colonic Mucosa Using Textural Patterns Melanosis ilei associated with chronic ingestion of edible charcoal Gastrointestinal Endoscopy Melanosis Coli Gastroenterology & Hepatology of CNY