title: Cardiovascular malformations in Klinefelter's syndrome: report of three cases.
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006330:Heart Defects, Congenital / Q000150:complications*; D006345:Heart Septal Defects, Ventricular / Q000150:complications*; D006801:Humans; D007713:Klinefelter Syndrome / Q000150:complications*; D008297:Male; D012730:Sex Chromosomes