Definition
By Mayo Clinic staffUndescended testicle (cryptorchidism) is a testicle that hasn't moved into its proper position in the bag of skin hanging behind the penis (scrotum) prior to the birth of a baby boy. Usually just one testicle is affected, but in some cases both testes may be undescended.
An undescended testicle is more common among baby boys born prematurely or before 37 weeks.
For most boys born with one or two undescended testicles, the problem corrects itself within the first few months of life. If your infant has an undescended testicle that doesn't correct itself, surgery can usually be used to relocate it into the scrotum.
- Ashley RA, et al. Cryptorchidism: Pathogenesis, diagnosis, treatment and prognosis. Urologic Clinics of North America. 2010;37:183.
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- Cooper CS, et al. Undescended testes (cryptorchidism) in children and adolescents. http://www.uptodate.com/home/index.html. Accessed Aug. 12, 2010.
- Braunstein GD. Endocrinology and the life span. In: Kronenberg HM, et al. Williams Textbook of Endocrinology. 11th ed. Philadelphia, Pa.: Saunders Elsevier; 2008. http://www.mdconsult.com/das/book/body/213947045-6/1037085104/1555/158.html#4-u1.0-B978-1-4160-2911-3..50026-1--cesec117_2351. Accessed Aug. 12, 2010.
- Nippoldt TB (expert opinion). Mayo Clinic, Rochester, Minn. Aug. 15, 2010.


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