VCUG, 6 months of age: dilated atretic right ureter with high grade vesicoureteral reflux (arrow), high grade vesicoureteral reflux into tortuous left ureter that lies to the left of midline (block arrow), and the dilated left collecting system with blunting of the calyces to the right of midline (arrowhead), suggestive of left crossed fused renal ectopy.