Testicular torsion has a bimodal distribution, with extra-vaginal torsion affecting neonates in the perinatal period, and intra-vaginal torsion affecting males of any age but most commonly adolescent boys. In males <25 years of age, the annual incidence of torsion is 1 in 4000 in the US. Torsion can be seen at any age but it is not generally a disease affecting the elderly. For the year 2009-10 there were 2213 patients with testicular torsion admitted to hospital in England, of which only 12 cases were in patients >60 years old.
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