Migrated embolization coil as a nidus for recurrent renal stones: A case report

Migration of embolization coils into the urinary collecting system is an exceedingly rare complication that may lead to recurrent urolithiasis. We report a case of recurrent renal stone formation caused by intraluminal migration of an embolization coil following selective renal arterial embolization performed for post-percutaneous nephrolithotomy (PCNL) hemorrhage. During ureteroscopic stone management, the coil was identified within the renal collecting system, serving as a nidus for stone formation, and was partially removed endoscopically. Recognition of this rare complication is essential for accurate diagnosis and appropriate management in patients presenting with recurrent renal stones after renal arterial embolization.