RésuméBut : La cryptorchidie est une pathologie assez fréquente en urologie. Elle est associée à un risque élevé d'infertilité et de dégé-nérescence. Elle semble aussi être associée à un risque important de torsion. Cette entité est très peu abordée dans la littérature. Nous rapportons tous les cas de torsion sur testicule cryptorchide observés à notre service dans le but de mieux caractériser cette pathologie et de réduire ainsi le taux d'orchidectomies. AbstractPurpose: Cryptorchidism is a rather frequent pathology in urology. It is associated with a high risk of infertility and degeneration. It also seems to be associated with a high risk of torsion. This entity is poorly studied in the literature. We studied the cases of torsion on cryptorchid testicles hospitalized at our service, to better characterize this pathology and reduce the rate of orchidectomy. Methods: We underwent a retrospective study of all the cases of torsion on a cryptorchid testicle hospitalized in our service of urology between 1999 and 2007. Results: The age of patients was between 7 months and 39 years. Torsion touched the right testicle in 53% of the cases. Patients experienced a brutal pain of the inguinal area with an under cutaneous mass inflammatory and a painful and empty homolateral scrotum. In 60% of the cases, the diagnosis was late and an orchidectomy was carried out. In the other cases, a lowering of the testicle was done with the controlateral orchidopexy. Conclusion: Even though torsions on a cryptorchid testicle are rare, we should not ignore them. The early diagnosis will make it possible to save and lower the testicle, and track a possible degeneration.