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 Definitions of klinefelter syndrome  

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Definition of 'klinefelter syndrome' Princeton's WordNet 

1. (noun) Klinefelter's syndrome, Klinefelter syndrome, XXY-syndrome
syndrome in males that is characterized by small testes and long legs and enlarged breasts and reduced sperm production and mental retardation; a genetic defect in which an extra X chromosome (XXY) is present in the male


Definition of 'klinefelter syndrome' U.S. National Library of Medicine 

1.  klinefelter syndrome
A form of male HYPOGONADISM, characterized by the presence of an extra X CHROMOSOME, small TESTES, seminiferous tubule dysgenesis, elevated levels of GONADOTROPINS, low serum TESTOSTERONE, underdeveloped secondary sex characteristics, and male infertility (INFERTILITY, MALE). Patients tend to have long legs and a slim, tall stature. GYNECOMASTIA is present in many of the patients. The classic form has the karyotype 47,XXY. Several karyotype variants include 48,XXYY; 48,XXXY; 49,XXXXY, and mosaic patterns ( 46,XY/47,XXY; 47,XXY/48,XXXY, etc.).



'klinefelter syndrome' - Nearby Entries  

klimt  kline  klinefelter  klinefelter syndrome  klinefelter's syndrome  klondike  klopstock  



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