[Calcified porcine xenograft in childhood].
D001705:Bioprosthesis; D002114:Calcinosis / Q000601:surgery*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006350:Heart Valve Prosthesis / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008943:Mitral Valve / Q000601:surgery*; D008944:Mitral Valve Insufficiency / Q000601:surgery; D012086:Reoperation