Cryptorchidism is the absence of one or both testes from the scrotum. The word is from the Greek κρυπτός, kryptos, meaning hidden ὄρχις, orchis, meaning testicle. It is the most common birth defect of the male genital. About 3 % of full-term and 30 % of premature infant boys are born with at least one undescended testis. However, about 80 % of cryptorchid testes descend by the first year of life (the majority within three months), making the true incidence of cryptorchidism around 1 % overall. Cryptorchidism may develop after infancy, sometimes as late as young adulthood, but that is exceptional.\n\nAnswer this question: failure of the testes to descend into the scrotum at birth? OK. Let's think. My stream of consciousness:
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The relevant information is: Cryptorchidism is the absence of one or both testes from the scrotum. The answer is Cryptorchidism.
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