title: Urinary hematin calculi.
abstract: We report 2 cases of nephrolithiasis owing to hematin stones. One patient had no apparent explanation for this finding, while the other was receiving warfarin anticoagulation for a prosthetic aortic valve. The chemical nature, etiology and clinical features of hematin calculi are discussed.
authors.affiliation: Department of Surgery, University of Arizona, Tucson.
authors.forename: J I
authors.initials: JI
authors.lastname: Miller
authors.forename: R B
authors.initials: RB
authors.lastname: McBeath
authors.forename: G W
authors.initials: GW
authors.lastname: Drach
mesh_terms: D000368:Aged; D005260:Female; D006427:Hemin / Q000032:analysis*; D006801:Humans; D007669:Kidney Calculi / Q000737:chemistry* / Q000453:epidemiology; D008875:Middle Aged; D012307:Risk Factors; D014859:Warfarin / Q000627:therapeutic use
chemical_list: D014859:Warfarin; D006427:Hemin