Tabriz University of Medical Sciences Medical Journal of Tabriz University of Medical Sciences 2783-2031 33 6 2012 03 11 Familial History of Cryptorchid Patients of Tabriz Children Hospital 75 77 EN Fahimeh Kazemi Rashed Saeed Aslanabadi Shahin Khorsand Journal Article 2012 03 12 Background and Objectives: Cryptorchidism is the most common urogenital anomaly which has been evaluating in childhood. Understanding the hormonal, molecular and genetic predisposing factors is important to treat and protect this anomaly. The aim of the present study was to evaluate the prevalence of cryptorchidism in male members of the cryptorchid children’s families. Materials and Methods: A total of 1410 members of the cryptorchid patients treated between 2005 and 2007 were observed for presence of cryptorchidism. Results: There were 107 cases of cryptorchidism among male members of the cryptorchid children’s families (7.5%). Conclusion: In comparison with the prevalence of cryptorchidism in East Azarbaijan province (1.35%), the familial prevalence is 5.6 fold higher. This may imply a probable genetic predisposition.