In cats, at what age is normal testicular descent complete?
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Normally testes descend prenatally in cats and are in the scrotum at birth. The testes can move in and out of the inguinal canal until six months of age, so cannot make a definitive diagnosis of cryptorchidism until that time.
A presumptive diagnosis of cryptorchidism is considered if both testes are not in the scrotum at two months of age.
The presence of penile spines confirms cryptorchidism in male cats in which neuter status is unknown because they develop under the influence of testosterone.
Cryptorchidism occurs in approx. 1.3% of cats and is seen more commonly in dogs. It is considered a heritable disease. Unilateral cryptorchidism is more common than bilateral.
Tx: Castrate and remove retained testes to reduce unwanted intact male behavior and the risk of testicular neoplasia.
