Minimally Invasive Approach to Ureteral Stricture in Transplant Kidney by Periodic Retrograde Ureteral Stent Placement and Exchange.

Purpose: The aim of the study was to evaluate the effectiveness of minimally invasive treatment of ureteral strictures and describe the technique that we used for retrograde placement of ureteral stent in transplant kidneys.

Material And Methods: We reviewed the medical cards of all transplant kidney patients with persistent ureteral strictures who were managed with periodical ureteral stent placement and balloon dilatation between 2008 and 2016. Different maneuvers that were used to overcome the difficulties for retrograde ureteral stent placement and exchange were discussed. Clinical characteristics and treatment outcomes of the study cohort were analyzed.

Results: Between 2008 and 2016, a total of 1026 transplantations were performed in our clinic, and ureteral stricture was found in 13 patients (1.26%). Of the 13 patients, 8 were treated with periodic ureteral stent insertion and balloon dilatation. Ureteral stent insertion or stent exchange was performed in 52 transplant renal units. The overall success rate of retrograde ureteral stent insertion at the first attempt was 75% and stent exchange success rate was 100%. Renal function remained stable in all patients during a median follow-up of 41 months (range, 13-60 months). No other local or systemic complication was encountered and no stent encrustation was noted.

Conclusions: Endoscopic management of ureteral stricture by periodical retrograde ureteral stent replacement and balloon dilatation is safe, effective, and highly successful in transplant patients who are not eligible for open reconstructive surgery.