Ismaili K, Hall M, Piepsz A, Wissing K, Collier F, Schulman C, et al. Primary vesicoureteral reflux detected in neonates with a history of fetal renal pelvis dilatation: a prospective clinical and imaging study. J Pediatr. 2006;148:222-7 pubmed
..In most infants with VUR, the reflux is of low grade and resolves rapidly. In those children with high-grade VUR, spontaneous resolution is rare at age 2 years, but persistent reflux rarely impairs the maturation of renal function. ..
Ismaili K, Avni F, Piepsz A, Wissing K, Cochat P, Aubert D, et al. Current management of infants with fetal renal pelvis dilation: a survey by French-speaking pediatric nephrologists and urologists. Pediatr Nephrol. 2004;19:966-71 pubmed
..The variability in attitudes is most probably due to the absence of clear guidelines based on prospective and controlled trials. ..
Ismaili K, Hall M, Piepsz A, Alexander M, Schulman C, Avni F. Insights into the pathogenesis and natural history of fetuses with renal pelvis dilatation. Eur Urol. 2005;48:207-14 pubmed