title: Mitral valve prolapse in Klinefelter syndrome.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D006801:Humans; D007713:Klinefelter Syndrome / Q000150:complications* / Q000235:genetics; D008297:Male; D008875:Middle Aged; D008945:Mitral Valve Prolapse / Q000150:complications* / Q000235:genetics