Background/purpose: To evaluate the success rate of open ureteroneocystostomy (UNC) after failed endoscopic treatment of vesicoureteral reflux (VUR) in children and to discuss the reasons for failure under the light of histopathological findings.
Methods: The clinical data of 371 patients who underwent endoscopic injection for VUR at our institution for the treatment of VUR between January 2008 and January 2014 were reviewed. Patients who were submitted to open ureteral reimplantation following failed endoscopic injection were included in the study.
Results: Among 371 patients, 34 (49 ureters) were submitted to open UNC (9.1%). There were 22 female and 12 male patients. Three different injection materials were used; dextranomer/hyaluronic acid in 29, carbon-coated beans in 7 and polyacrylate polyalchohol copolymer in 13. Histological study revealed that the injected material was identified in 34 ureters as malpositioned. Control VCUG 6 months after UNC showed complete resolution in 46 of 47 ureters (97.87%).
Conclusions: Previous endoscopic injection, although causing difficulty in dissection to some degree, does not alter the success rate of UNC. According to the histopathological findings, the cause of failure of injection seems to be attributable to incorrect plane of injection or leakage of the agent after injection.
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