[Cryptorchidism: An update of advances in its diagnosis and treatment].

The absence of one or both testicles in the scrotal position is defined as cryptorchidism. It occurs in 1 - 8 % of full-term newborns and up to 45 % of preterm newborns. Its detection is of great importance due to its association with fertility disorders and the risk of malignancy. The National Endocrinology Committee of the Sociedad Argentina de Pediatría decided to prepare an update document on advances in the diagnosis and treatment of cryptorchidism that contributes to the performance of pediatric practice and allows recognition of conditions that may be accompanied by cryptorchidism, but need more evaluation and referral to a specialist, such as alterations/differences in sexual development, anorchia, genetic syndromes, among others. The first-line treatment is early orchiopexy before 12 to 18 months, always in the hands of pediatric surgeons.