Toddler with a urinary tract infection

US of congenital megaureter
Sagittal US of the left kidney (above) and left ureteropelvic junction (below) show moderate hydroureteronephrosis. There was moderate hydroureter all the way to the ureterovesical junction. A subsequent voiding cystourethrogram showed no evidence of vesicoureteral reflux.

The diagnosis was congenital megaureter.