Cryptorchidism

**Definition:** A developmental defect in which a TESTIS or both TESTES failed to descend from high in the ABDOMEN to the bottom of the SCROTUM. Testicular descent is essential to normal SPERMATOGENESIS which requires temperature lower than the BODY TEMPERATURE. Cryptorchidism can be subclassified by the location of the maldescended testis.

**Tree numbers:** - C12.100.500.829.258 - C12.200.294.829.258 - C12.200.706.258 - C12.800.258 - C16.131.939.258 - C19.391.829.258

**Synonyms:** - Cryptorchism - Testes, Undescended - Testis, Undescended - Cryptorchidism, Unilateral Or Bilateral - Undescended Testis