Figure Legends
Figure 1: The first injection through the catheter (arrowhead) shows collateral vessels, retroperitoneal contrast accumulation, and also the entrance of contrast into the left renal pelvis (arrows).
Figure 2: This figure illustrates severe stenosis (arrows) of the left common iliac vein with an enlarged trans-pelvic collateral vein (arrowhead) indicating the May-Thurner syndrome diagnosis.
Figure 3: Balloon angioplasty of the left common iliac vein.
Figure 4: The appropriate result after balloon angioplasty of the common iliac vein with complete restoration of venous flow.
Figure 5: The abdominopelvic CT scan, a few hours after venoplasty, shows a significant accumulation of contrast in the left renal pelvis (compared to the normal excretion of contrast in the right kidney), without any signs of ongoing retroperitoneal hemorrhage or perinephric collection (A: Axial view, B: Coronal view).