Titlebook: Normal Testicular Descent and the Aetiology of Cryptorchidism; John M. Hutson,Masaru Terada,Martyn P. L. Williams Book 1996 The Editor(s)

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Conclusions,clinical practice. The concept of two independent steps in testicular descent has allowed many previous studies that were apparently in conflict to be resolved. The possible role of MIS in initiating the first step has been discussed and now awaits definitive experiments to resolve the opposing stud

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Normal Testicular Descent,e groin and then outside the abdominal wall and into a definitive scrotum (Williams and Hutson 1991b). Migration to an extra-abdominal site has enabled the testis to function at a temperature below that of the rest of the body, with the scrotal testis of the human adapted to 33°C (Zorgniotti 1991).

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Book 1996ersies of timing of surgery, use of hormone therapy and congenital versus ‘acquired‘ undescended testes. New information about germ cell development in the postnatal testis is changing the way we view treatment and the ultimate prognosis.

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Introduction,ler first described the gubernaculum (caudal genito-inguinal ligament) and processus vaginalis (Williams and Hutson 1991a). More needs to be known, not only of the normal mechanism, but also of the ways that it can be deranged to produce undescended testes.

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Book 1996s of cryptorchidism are described which shed light on the possible aetiology. A brief summary is given of current management, highlighting the controversies of timing of surgery, use of hormone therapy and congenital versus ‘acquired‘ undescended testes. New information about germ cell development i

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