Objectives: Authors present a case of successful surgical treatment of a ureter diverticulum observed 3 months after kidney transplantation. Methods: The fluid collection was detected by ultrasound. Percutaneous drainage was performed. after that the excretion of 4 litres of fluid was observed during 12 hours. This finding clearly indicated the connection with the urinary system. This fact was proved and precisely localised by contrast filling of the lesion under fluoroscopic control. Results: Resection of the ureter diverticulum was performed. and the patient recovered fully. there was no change observed in the graft function during the whole procedure. Conclusion:The ureter diverticulum is a rare complication after kidney transplantation: the present case is the only one observed among more then 600 kidney transplantations performed during 20 years in our centre.

Keywords: Kidney, Transplantation, ureter diverticulum, ultrasound, Drainage