Treatment of ureteropelvic junction obstruction with percutaneous endopyelotomy

Objective:To evaluate the clinical efficacy of percutaneous endopyelotomy(PAE) in the minimally invasive treatment of ureteropelvic junction obstruction(UPJO).Method:Between June 2003 and August 2010,75 patients of UPJO had undergone PAE.Clinical data were analyzed retrospectively.Success was defined as both radiographic and symptomatic improvement.Result:Sixty-nine(92.0%) patients were operated in one session of PAE,and 4 needed second session of PAE,2 abandoned further treatment.Single PAE operations were performed in 59(80.8%) patients.Combined antegrade and retrograde endopyelotomy were performed in 14(19.2%) patients.65 patients were treated by electrocautery endopyelotomy,5 by holmium laser,3 by cold knife.The estimated 6 months,12 months,and 24 months recurrence-free survival rates for the endopyelotomy group were 84.9%,75.3%,and 71.2%,respectively.Conclusion:PAE is effective for treatment of UPJO,while the recurrence rate for secondary UPJO and those failed other treatment modality is high.