Circulating Genotypes of Hepatitis C Virus in Italian Patients before and after the Application of Wider Access Criteria to HCV Treatment Melanosis Coli Gastroenterology & Hepatology of CNY Clearance of hepatitis C virus is associated with early and potent but narrowly directed, Envelope specific antibodies Scientific Reports 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