Urological congenital malformations (UCM) are a major cause of morbidity in pediatric patients. They may lead to severe kidney failure or even death, and can contribute to impotence and infertility in adulthood. It is vitally important to follow up these patients to identify complications, outcomes and possible disa- bility secondary to these congenital diseases. For this reason we conducted a telephone survey follow-up to 40 patients with UCM in Bogota, Colombia. After analyzing many variables we found that in our city, mortality directly related