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Virtual Pediatric Hospital: Paediapaedia: Hydronephrosis, Congenital Paediapaedia: Genitourinary Diseases

Hydronephrosis, Congenital

Michael P. D'Alessandro, M.D.
Peer Review Status: Internally Peer Reviewed


Clinical Presentation:
Palpable abdominal mass.

Etiology/Pathophysiology:
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 obstruction.

Pathology:
Not applicable

Imaging Findings:
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.

DDX:

References:
See References Chapter.

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