Successful Closure of Persistent Urinary Fistula After High‐Grade Renal Trauma Using N‐Butyl‐2‐Cyanoacrylate: A Case Report

ABSTRACT Introduction Persistent urinary extravasation after high‐grade renal trauma is uncommon but may require intervention. Minimally invasive, kidney‐preserving options are particularly desirable in young patients. Case Presentation An 18‐year‐old man sustained blunt trauma in a motorcycle accident. Contrast‐enhanced computed tomography revealed renal injury with urinary extravasation. Emergency transcatheter arterial embolization was performed for hemorrhage control. Despite subsequent ureteral stenting and percutaneous drainage, urinary leakage persisted. Fistulography demonstrated a small fistulous tract between the urinoma cavity and the lower calyx. Selective embolization using N‐butyl‐2‐cyanoacrylate (NBCA) was performed, resulting in immediate resolution without complications. Conclusion Selective NBCA embolization is a safe and minimally invasive treatment option for persistent urinary fistula after renal trauma.