Michael P. D'Alessandro, M.D.
Peer Review Status: Internally Peer Reviewed
Palpable abdominal mass.
Twenty-two percent are due to congenital ureteropelvic junction
obstruction, the rest are due to posterior urethral valves, ectopic
ureteroceles, prune belly syndrome, and ureterovesical junction
On ultrasound multiple anechoic cysts which communicate with a large
central cyst are seen.
Renal scintigraphy is a very good way to distinguish congenital
hydronephrosis from multicystic dysplastic kidney as in congenital
hydronephrosis there is a rim of functioning tissue, whereas in
multicystic dysplastic kidney there is no functioning tissue.
Multicystic dysplastic kidney - the cysts do not communicate
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