Similar congenital anomalies in siblings are common.1-3 Enuresis,4 vesicoureteral reflux,5 and ureteroceles6 have been reported in identical twins, but posterior urethral valves have not been confirmed in proven monozygotic twins.
CASE REPORT
Twin boys, weighing 2,380 and 2,637 g, were born by repeat cesarean section to an 18-year-old, gravida 2, para 1 woman. The placenta was monochorionic and diamniotic. Immediately after birth, twin A developed grunting respiration and mild substernal retraction; a firm 6 x 5 cm suprapubic mass was palpated. Suprapubic aspiration produced clear urine, and catheterization decreased the size of the mass. A voiding cystourethrogram and an intravenous pyelogram were diagnostic of posterior urethral valves.
Bilateral duplex collecting system with bilateral vesicoureteral reflux: a case report