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Related Experiment Videos

[The familial undescended testis].

A Elert1, K Jahn, A Heidenreich

  • 1Klinik für Urologie und Kinderurologie, Philipps-Universität Marburg.

Klinische Padiatrie
|January 25, 2003
PubMed
Summary

Undescended testis (UDT) is more common in families than previously thought. A family history of UDT significantly increases the risk for male newborns, suggesting a genetic predisposition.

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Area of Science:

  • Pediatric Urology
  • Genetics
  • Reproductive Medicine

Background:

  • Undescended testis (UDT) affects 1% of one-year-old boys.
  • Familial occurrence of UDT has been noted but not extensively studied.
  • Previous studies have primarily focused on individual case descriptions.

Purpose of the Study:

  • To evaluate the frequency of a positive family history of UDT.
  • To determine the prevalence of associated urogenital anomalies in family members.
  • To calculate the risk of UDT in newborns with affected family members.

Main Methods:

  • A case-control study involving 74 patients with UDT and 374 matched controls.
  • Specialized questionnaires were used to gather family history of UDT and other urogenital anomalies.
  • Medical records were reviewed, and statistical analysis included odds ratio calculation.

Main Results:

  • A positive family history of UDT was found in 22.73% of patients versus 7.5% of controls.
  • Brothers (37.3%) and fathers (35.2%) were most frequently affected.
  • The risk for UDT in newborns is 3.6-fold higher if a family member has UDT, increasing to 6.9-fold if a brother is affected.

Conclusions:

  • The prevalence of UDT in families is higher than previously reported.
  • A significant familial clustering and higher incidence of urogenital anomalies suggest a genetic predisposition.
  • Male descendants have a 3.6-fold increased risk of UDT if a family member is affected.

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