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Klinefelter syndrome

C M Smyth1, W J Bremner

  • 1Department of Medicine, Veterans Affairs Puget Sound Health Care System, Seattle 98108, USA.

Archives of Internal Medicine
|June 30, 1998
PubMed
Summary
This summary is machine-generated.

Klinefelter syndrome, a common sex chromosome disorder, affects males with an extra X chromosome, leading to hypogonadism and infertility. Testosterone therapy can improve symptoms but not fertility.

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Area of Science:

  • Endocrinology
  • Genetics
  • Urology

Background:

  • Klinefelter syndrome is the most frequent sex chromosome abnormality in males.
  • It is characterized by the presence of an additional X chromosome (typically 47,XXY).
  • Clinical manifestations exhibit significant variability, ranging from classic signs to subtle features.

Purpose of the Study:

  • To review the clinical presentation, diagnosis, and management of Klinefelter syndrome.
  • To emphasize the importance of recognizing this condition in primary care settings.

Main Methods:

  • Diagnosis is confirmed via chromosomal karyotyping.
  • Clinical suspicion can be raised through patient history and physical examination, noting small, firm testes.

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Main Results:

  • Affected individuals experience male hypogonadism, androgen deficiency, and impaired spermatogenesis.
  • Testosterone replacement therapy addresses androgen deficiency, enhances virilization, improves mood, and protects against osteoporosis.
  • Testosterone therapy does not restore fertility.

Conclusions:

  • Early diagnosis and management of Klinefelter syndrome are crucial for optimizing patient outcomes.
  • Primary care physicians play a vital role in identifying and managing this prevalent condition.