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.