title: Quadricuspid aortic valve.
abstract: A case of quadricuspid aortic valve is described. The anomaly was unexpectedly found during operation for aortic valve replacement in a 70-year-old woman. Macroscopic and histological examinations of the valve showed no sign of previous inflammatory disease. Quadricuspid aortic valve must be considered, therefore, a malformation capable of leading to severe valve failure in later life.
mesh_terms: D000368:Aged; D001021:Aortic Valve / Q000002:abnormalities* / Q000473:pathology / Q000601:surgery; D001705:Bioprosthesis; D005260:Female; D006350:Heart Valve Prosthesis; D006801:Humans