[Correction of posterior hypospadias by a transverse vascular preputial graft, evolution of technics and results. Apropos of 42 cases].

During more than seven years 42 hypospadias were treated in on stage with different technics of urethroplasty by transverse preputial gauntlet grafts. With original Duckett's technic only 21,5% of patients had a good result. The authors reduced the risk of devascularisation first time by a personal modification then by using the double face flap described by Duckett himself; then the percentage of success after one operation overtake 75%. The different complications and their treatment are described and some operative details are pointed out to prevent complications.