Valvas de uretra posterior

CONCLUSION: The good renal function of more than half of the renal units with high-grade reflux at presentation, and the persistence of reflux mainly in nonfunctioning or poorly functioning kidneys after valve ablation, support the concept that in some patients with valves, reflux and renal damage are associated anomalies.
Posterior Urethral Valves: Relationship Between Vesicoureteral Reflux and Renal Function
Denis A. Cozzi, Debora Morgante, Simone Frediani, Romina Iaconelli, Silvia Ceccanti,
Ermelinda Mele, and Francesco Cozzi
UROLOGY 77: 1209–1212, 2011.