Etiology
anatomical or functional obstruction of congenital lower urinary tract
- segmental obstruction
- unilateral obstruction
- unilateral obstruction of pelviureteral junction
- ureteral implantation anomaly
- ureteral atresia
- bilateral obstruction +/- with Prune-Belly sequence
- bilateral obstruction of pelviureteral junction
- posterior urethral valves in boys
- urethral atresia
- megacystic-megaureter syndrome
Synopsis
Renal dysplasia lesions
- cysts formation
- primary ductules
- immature dysplastic tubulules surrounded by condensed mesenchyme
- basement membrane may be thick and eosinophilic
- immature glomeruli
- immature tubules
- metaplastic cartilage foci (islands of immature cartilage)
association with hydronephrosis and/or hydronephrosis
dilated and tortuous ureters
Case records
Case 10041: Ureteral duplication with two blind ureteres and vesical agenesis. Severe caudal regression syndrome with sirenomelia. 19 weeks.