What is the prevalence of testicular torsion?

Updated: Aug 31, 2018
  • Author: Oreoluwa I Ogunyemi, MD; Chief Editor: Edward David Kim, MD, FACS  more...
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Answer

Extravaginal torsion constitutes approximately 5% of all torsions. Of these cases of testicular torsion, 70% occur prenatally and 30% occur postnatally. The condition is associated with high birth weight. Bilateral perinatal torsion is thought to be rare, although an increase in the number of case reports has been observed. Currently, there are about 56 case reports in the literature. [8]

Intravaginal torsion constitutes approximately 16% of cases in patients presenting to an emergency department with acute scrotum. This form of testicular torsion is most often observed in males younger than 30 years, with most aged 12-18 years. Peak incidence occurs at age 13-14 years. The left testis is more frequently involved. Bilateral cases account for 2% of all torsions.

The incidence of torsion in males younger than 25 years is approximately 1 in 4000. [9] In an Israeli study of pediatric patients presenting to an ED with scrotal/testicular pain of less than 1 week duration, only 17 (3.3%) had testicular torsion. [10]

Several case reports describe familial testicular torsion. In one study of 70 boys with testicular torsion, 11.4% had a positive history in a family member. [11]


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