Extravasation of urinary excreted iodine contrast into peripelvic cysts due to obstructive hydronephrosis

Dermesropian, François [UCL] Deprez, Fabrice [UCL]

(eng) A 47-year-old male with a remote history of nephrolithiasis presented to the hospital with acute left flank pain radiating to the left groin and no documented fever. There was a significant family history of renal colic. Laboratory analysis only revealed microscopic hematuria.Unenhanced abdominal CT (Fig. 1) showed a 2 mm renal stone located at the left vesico-ureteral junction. Moreover, multiple bilateral peripelvic cysts were observed.In order to exclude or evaluate a left kidney hydronephrosis in addition to peripelvic cysts, intravenous iodine contrast injection was performed, early (Fig. 2) and late (Fig. 3) excretory acquisitions were obtained.