“…The ureter draining the lower moiety, although normally located, has a shorter intramural course at the vesicoureteric junction and is more prone to reflux and infection (Bissett and Strife, 1987;Sutton, 1987). When complete duplication is present it is the ureter draining the upper moiety that is ectopic (Persky and Noseworthy, 1976;Young and Lebowitz, 1987); the pelvicaliceal system associated with it is frequently abnormal (Yue, 1974). Ureteroceles may be present and are often associated with a dysplastic or obstructed upper moiety, or both (Young and Lebowitz, 1986;Sutton, 1987).…”