Quantitative Analysis of Melanosis Coli Colonic Mucosa Using Textural Patterns 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 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 Interpretation of Hepatitis C Test Results: Guidance for Laboratories Hepacivirus C Encyclopedia MDPI