Percutaneous retrieval of coiled double-J stent from renal pelvis after Anderson-Hynes pyeloplasty: report of two cases.

Double-J (DJ) ureteral stents are routinely placed for internal urinary diversion post renal pyeloplasty. Malfunction of the stent may occur due to migration, necessitating removal. Upward migration of a DJ stent is rarely encountered in urologic practice when a ureteroscope is used to retrieve the stent. However, retrieval of upwardly migrated stents through ureteroscopy may be challenging in the pediatric population, especially in postoperative cases. We report two pediatric cases of post Anderson-Hynes pyeloplasty in whom the DJ stents were found coiled up in the renal pelvis and were retrieved successfully through percutaneous nephrostomy using semirigid bronchoscopic forceps.