Klinefelter Syndrome

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Is a:
  • Disease or Syndrome
  • Congenital Abnormality
Definition:
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.).
Synonyms:
  • Klinefelter Syndromes
  • Klinefelter's Syndrome
  • Klinefelters Syndrome
  • Syndrome, Klinefelter
  • Syndrome, Klinefelter's
  • Syndromes, Klinefelter
Broader Topics:
Narrower Topics:
  • None
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