Colon Polyps: ICD 10 Coding AAPC Knowledge Center 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 Intraoperative discovery of melanosis coli during emergent bowel resection for perforation BMJ Case Reports Melanosis coli Wikipedia Pathology Outlines Melanosis coli Quantitative Analysis of Melanosis Coli Colonic Mucosa Using Textural Patterns