Successful percutaneous flexible ureteroscopy for treatment of distal ureteral stones under modified Valdivia position after Cohen reimplantation

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INTRODUCTION: Endoscopic retrograde access to the upper urinary tract after Cohen reimplantation for the treatment of vesicoureteral reflux in children is usually difficult. CASE PRESENTATION: We experienced a case involving a few large ureteral stones in the right distal ureter after Cohen reimplantation. We initially failed retrograde access using flexible cystoscope. Therefore, we performed antegrade flexible ureteroscopy through the 10- to 12-Fr access sheath from the middle calyx to treat the few ureteral stones (>1.5 cm) in the right ureter with the patient in the modified Valdivia position. This one-stage procedure was successful. The patient achieved a stone-free status without major complications. CONCLUSION: The herein-described approach that was implemented after Cohen reimplantation was successful. We believe that recent endourologic developments contributed to the good outcome in this case.

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