Fig. 2

The endovascular procedure and the findings of intravascular ultrasound. a, Baseline angiography did not show the blood flow into the left ureter from the left iliac arteries. b and c A 0.014-in. guidewire was advanced into the left ureter along the stent from the subintimal lumen of the external iliac artery (white arrows). The anatomical findings were evaluated by intravascular ultrasound (IVUS). d IVUS detected the stent with an acoustic shadow (yellow plus signs) in the left ureter. e–g IVUS detected the communication between the ureter and subintimal lumen of the EIA (white asterisks denote true lumen of the left external iliac artery)