title: Biliary matrix: matrix stones as a cause of biliary obstruction.
abstract: The biliary tree secretes a mucous substance which serves as a matrix in gallstones. A case of biliary obstruction secondary to a matrix stone is reported. The characteristics and significance of biliary matrix are discussed.
mesh_terms: D000368:Aged; D002758:Cholangiography; D002769:Cholelithiasis / Q000150:complications* / Q000000981:diagnostic imaging; D002779:Cholestasis / Q000000981:diagnostic imaging / Q000209:etiology*; D006025:Glycosaminoglycans; D006801:Humans; D008297:Male
chemical_list: D006025:Glycosaminoglycans