ABSTRACT
This study included 34 children, 30 males and 4 females, their ages ranged from 3 months to 3 years. They were suffering from obstructive uropathy. After routine investigations, abdominal ultrasonography was done for them. They were divided into 3 groups according to their presentation and clinical examination, the first group [7 cases] was diagnosed by sonography as pelvic hydronephrosis, while plain X-ray and IVPs were not confirmative. The second group [12 patients] was diagnosed by ultrasonography as radiolucent stones in pelviureteric junctions or upper ureter that were unilateral in 3 cases and bilateral in 9 cases, while plain X-ray and IVU were not diagnostic. The third group [15 cases] was diagnosed by ultrasonography as infravesical obstruction and confirmed by cystourethrography and urethrocystoscopy. It could be concluded that ultrasonography is the best way for rapid and safe diagnosis of obstructive uropathy in infants and young children when compared to other methods of diagnosis