Infant with bilateral prenatal hydronephrosis

US of ureteropelvic junction obstruction
Sagittal US of the right kidney (upper left) and left kidney (upper right) shows bilateral mild to moderate hydronephrosis. AP image from the excretory phase of an intravenous pyelogram shows bilateral moderately dilated renal collecting systems with normal appearing bilateral ureters.

The diagnosis was bilateral ureteropelvic junction obstruction.