Teenager with flank pain

CT and VCUG of bilateral orthotopic ureteroceles
Coronal (above left) and axial (below left) CT without contrast of the abdomen show single renal collecting systems bilaterally along with bilateral oval fluid-filled structures superior and posterior to the bladder near the ureterovesical junctions. AP image from a voiding cystourethrogram exam (right) shows two large round filling defects in the bladder.

The diagnosis was bilateral orthotopic ureteroceles.