Melanosis coli** Melanosis coli is a benign, reversible condition characterized by brown black pigmentation of the colonic mucosa, most often due to chronic use of anthraquinone laxatives. The discoloration is caused Brasil A complete molecular biology assay for hepatitis C virus detection, quantification and genotyping A complete molecular biology assay for hepatitis C virus detection, quantification and genotyping Leukocytoclastic vasculitis and necrolytic acral erythema in patients with hepatitis C infection: Do viral load and viral genoty Molecular diagnosis of viral hepatitis Gastroenterology Colonic melanosis due to excessive consumption of laxatives containing anthraquinone and senna : r MedicalGore