Common causes of hydronephrosis in children

The most common cause of hydronephrosis is the stricture and obstruction of the ureteropelvic junction, accounting for more than 80%. The purpose of surgery is to remove the stricture. Pyeloplasty is widely used in clinical practice and has been unanimously recognized.

Other causes are seen in the valve of the ureteropelvic junction, as well as the high position of the ureteropelvic junction, also known as high ureter

.