Abstract
Endoscopic subureteral injection for the management of vesicoureteral reflux has become a well-established first-line minimally invasive treatment strategy. One potential pitfall is the creation of ureteral obstruction. No predictors are available to determine which patients will develop this rare, but real, complication. A retrospective evaluation of 2 girls, aged 3 and 4 years, with grade 4 and 3 reflux, respectively, and documented ureteral obstruction after endoscopic treatment with dextranomer/hyaluronic acid copolymer. Before treatment, both patients had had refluxing megaureters with a distal aperistaltic segment. Ultimately, they both required open, cross-trigonal ureteral reimplantation with resolution of vesicoureteral reflux and ureteral obstruction. Congenital refluxing megaureter with a distal aperistaltic segment might be a relative contraindication to endoscopic subureteral injection of a bulking agent for the management of vesicoureteral reflux.
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