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Related Experiment Videos

Foreskin development before adolescence in 2149 schoolboys.

Teng-Fu Hsieh1, Chaog-Hsian Chang, Shih-San Chang

  • 1Department of Urology, China Medical University Hospital, Taichung, Taiwan.

International Journal of Urology : Official Journal of the Japanese Urological Association
|August 3, 2006
PubMed
Summary

Foreskin development in elementary schoolboys shows a decline in physiological phimosis with age. Most cases of phimosis observed did not necessitate medical intervention.

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Area of Science:

  • Pediatric Urology
  • Developmental Biology

Background:

  • Study on external genitalia development in 2149 elementary schoolboys in Taiwan.
  • Focus on understanding foreskin development before adolescence.

Purpose of the Study:

  • To analyze the progression of foreskin conditions in relation to age.
  • To determine the prevalence of different foreskin types and other genital abnormalities.

Main Methods:

  • Classification of foreskin conditions into five types: normal prepuce, adhesion, partial phimosis, phimosis, and circumcised.
  • Examination of 692 first-grade, 725 fourth-grade, and 732 seventh-grade boys.
  • Recording of other genital abnormalities by a single urologist.

Main Results:

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  • Incidence of normal foreskin (Type I) increased with age (8.2% to 58.1%).
  • Incidence of phimosis (Type IV) decreased significantly with age (17.1% to 1.2%).
  • Low incidence of balanoposthitis; common abnormalities included varicocele and cryptorchitism.

    • Conclusions:

    • Physiological phimosis naturally resolves as boys age.
    • The majority of phimosis cases identified were not clinically significant and did not require treatment.