20 April 2026
: Case report 
Pseudoaneurysm of the Left Renal Segmental Artery With Delayed Detection After Blunt Trauma
Unusual clinical course
Atsuto Kobayashi E 1*, Masakazu Nabeta E 1, Nobuhisa Hirayu E 1, Osamu Takasu F 1DOI: 10.12659/AJCR.951740
Am J Case Rep 2026; 27:e951740
Figure 5 Evaluation of urinary extravasation on post-injury day 12 using delayed excretory-phase computed tomography (CT) urography and retrograde pyelography. (A) Axial delayed excretory-phase CT urography shows opacification of the left collecting system with high attenuation within the perirenal fluid collection (arrow), suggestive of urinary extravasation. (B) Coronal reconstructed delayed excretory-phase CT urography demonstrates the relationship between the opacified left collecting system and the adjacent perirenal fluid collection containing contrast (arrow). (C) Retrograde pyelography on day 12 revealed contrast leakage from the left lower calyx into the retroperitoneal space (arrow), confirming the diagnosis of urinoma. A ureteral stent was placed for urinary diversion.