Use and interpretation of virological tests for hepatitis C What Happens to Colon After Laxatives TikTok Melanosis Coli Gastroenterology & Hepatology of CNY Circulating Genotypes of Hepatitis C Virus in Italian Patients before and after the Application of Wider Access Criteria to HCV Treatment Melanosis Coli) Cathartic Colon 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