Sagittal US of the right (above left) and left (above right) kidneys shows parenchymal bars of tissue between the upper and lower poles of each kidney. Transverse US of the bladder (middle left) shows a round cystic structure on the right side of the bladder. Sagittal US of the bladder (middle right) shows the right ureter in continuity with the cystic structure within the bladder. AP image of the bladder (below left) obtained at the start of filling the bladder during a voiding cystourethrogram (VCUG) shows a round filling defect in the right base of the bladder. AP image of the bladder (below right) obtained during the voiding phase of the VCUG shows the previously seen filling defect in the base of the bladder has everted out of the bladder and now appears as a contrast filled structure to the right of the bladder.
