Anorchia
Definition:
A congenital (since birth) absence of one or both testes.
Causes, incidence, and risk factors:
Anorchia should be differentiated from cryptorchidism in that cryptorchidism includes all states in which the testis is absent from the scrotum but anorchia is the absence of testicles from the body.
Cryptorchid testes exhibit varying degreas of abnormality from total abscence (anorchia) to streak gonads to normal testis. About 5 per 100,000 males are born without testes (anorchic).
Common conditions associated with anorachia include:
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