cryptorchism


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cryptorchidism

 [krip-tor´kid-izm]
failure of one or both of the testes to descend into the scrotum. As the unborn male child develops, the testes first appear in the abdomen at about the level of the kidneys. They develop at this site, and in approximately the seventh month of fetal life start to descend to the upper part of the groin. From there they move into the inguinal canal and then, normally, into the scrotum. In its descent, a testis may sometimes be halted in the abdomen or within the canal, becoming an undescended testis. An improperly developed testis may never leave the abdomen, and it may not produce the hormones that induce secondary sex characters. A testis lodged in the canal may well produce these secondary sex characters, but cannot produce spermatozoa. Cases in which both testes fail to descend are uncommon; usually only one is involved and the other produces sufficient numbers of spermatozoa.
Treatment. Often the undescended testis can be brought down into the scrotum by medical treatment with the gonadotropic hormone, and for physical and psychologic reasons this method is preferred. Frequently, however, surgery (called orchiopexy) is required. This operation is not particularly serious and is usually successful. It is best performed before the patient is 5 to 7 years old, since operating at a later age may involve more risk to the cells that produce spermatozoa.
 In cryptorchidism, the testis is not in the scrotum, but may be found in the inguinal canal or in the abdominal cavity. From Damjanov, 2000.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

cryp·tor·chi·dism

(krip-tōr'ki-dizm),
Failure of one or both testes to descend.
Synonym(s): cryptorchism
Farlex Partner Medical Dictionary © Farlex 2012

cryp·tor·chism

(kript-ōr'kizm)
Failure of one or both testes to descend.
Synonym(s): cryptorchidism.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Identification in rats of a programming window for reproductive tract masculinisation, disruption of which leads to hypospadias and cryptorchism. J Clin Invest 2008; 118:1478-90.
Crossed testicular ectopia with bilateral duplication of the vasa deferentia: an unusual finding in cryptorchism. J Pediatr Surg.
There is currently another theory stating that an abnormal development of the cranial suspensory ligament of testis causes an abnormal involution resulting in cryptorchism and colonization of the abnormal ligament by splenic cells.