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Undescended testes: a consensus on management

Department of Woman and Child Health, Karolinska Institutet, S-171 76 Stockholm, Sweden

(Correspondence should be addressed to E M Ritzén; Email: martin.ritzen{at}ki.se)

This paper was presented at the 5th Ferring International Paediatric Endocrinology Symposium, Baveno, Italy (2008). Ferring Pharmaceuticals has supported the publication of these proceedings.

The mode of treatment best for undescended testes is controversial, and local traditions often override knowledge gained from randomized controlled studies. In order to reach a consensus within the Nordic countries on the current state-of-the-art of treatment, a group of specialists in testicular physiology, paediatric surgery/urology, endocrinology, andrology, pathology and anaesthesiology from all the Nordic countries met for 2 days. Before the meeting, reviews of the literature had been prepared by the participants. Judging from published meta-analyses, hormonal treatment has low efficacy. Although 15–20% of retained testes descend during hormonal treatment, one-fifth of these re-ascend later on. Also, treatment with human chorionic gonadotropin (hCG) may be harmful to future spermatogenesis through increased apoptosis of germ cells. Orchiopexy, on the contrary, results in about 95% anatomical success, with a low (about 1%) risk of complications. The optimal time for orchiopexy has also been debated. However, a recent randomized controlled study shows that surgery at 9 months of age is followed by a better post-operative growth of the testes than surgery at 3 years, which supports previous arguments for early surgery. The unanimous conclusion of the group was that surgery is generally the preferred mode of treatment, rather than hCG or GnRH treatments. Orchiopexy should be performed between 6 and 12 months of age, or soon after diagnosis, if that occurs later. If a testis is found to be undescended at any age after 6 months, the patient should be referred for surgery. Referral should be to paediatric rather than general surgeons/urologists if the boy is less than 1 year old, if he has bilateral or non-palpable testes, or if he has got relapse of cryptorchidism.