An Unexpected Complication After Extracorporeal Shock Wave Lithotripsy: Emphysematous Pyelitis.

Emphysematous urinary tract infections (UTI) are life-threatening conditions caused by gas-forming organisms. Emphysematous pyelitis (EP) is a rare, acute bacterial UTI characterized by gas formation only in the renal collecting system. Extracorporeal shock wave lithotripsy (ESWL) treatment was performed for 10-mm sized stone in the left renal pelvis in an 81-year-old female patient with no known comorbidities other than hypertension. In the 10th hour following ESWL treatment, the patient referred to the emergency department with fever and left flank pain. Gas was noticed in the left renal collecting system in non-contrast computed tomography (NCCT). A wide spectrum antibiotic was given to the patient due to EP diagnosis and a nephrostomy catheter was placed in the left renal pelvis. EP should be considered in the patient with fever and flank pain after ESWL and NCCT should be performed for further examination. Quick diagnosis, examination and treatment of these patients in the emergency department are important.