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 Rapid point of care HCV RNA quantification in capillary whole blood for diagnosing chronic HCV infection, monitoring treatment and detecting reinfection HCV virological assessment Journal of Hepatology Quantitative Analysis of Melanosis Coli Colonic Mucosa Using Textural Patterns