Transverse US of the bladder (above left) shows a round cystic lesion in the base of the bladder. Sagittal US of the bladder (above right) shows to the left of the image an extremely dilated left ureter and to the right of the image again the round cystic lesion in the base of the bladder. Sagittal image of the left renal fossa (below left) shows non-visualization of the left kidney. Nuclear medicine MAG3 scan (below right) shows a normal right kidney, non-visualization of the left kidney, and a round photopenic defect in the bladder.
The diagnosis was left non-functioning kidney with left hydroureter and a left orthotopic ureterocele.
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