Patients and methods: from January 2007 to December 2012, at Children Hospital No. 2, there were 462 patients who underwent surgical treatment for hypospadias, ages from 12 months to 15 years old (mean age 7, 3), including middle hypospadias in 258 (56%) and posterior hypospadias in 204 (44%); tube flaps in 84 (19%) and onlay flaps in 104 (22%); double face in 108 (23%) and Duplay in 166 (36%).