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Results 1 - 1 of 1 for "48,XXXY" syndrome
  1. Klinefelter Syndrome (National Library of Medicine)  
    What is Klinefelter syndrome (KS)? Klinefelter syndrome (KS) is a genetic condition that happens when a male is born with an extra copy of the X chromosome. ...
    https://medlineplus.gov/klinefeltersyndrome.html - Health Topics