Abstract
Proximal double-J stents (DJ) migration is infrequent in the pediatric population. We present the case of a 5-year-old patient with a previous diagnosis of ureteropelvic junction obstruction who underwent a dismembered pyeloplasty in early infancy and suffered an anastomotic stricture. Endourological dilatation was performed. During placement of the DJ, it migrated proximally until it was wholly lodged in the renal pelvis. A second DJ was placed correctly, and the procedure was ended. Two months later, a successful retrograde removal was performed using an endourological hydrodistension system. We describe our technique, which may be a valuable resource for similar cases.