Fig. 1

a Anatomy seen in May-Thurner Syndrome: Axial CT venogram of the pelvis shows compression of the left common iliac vein (arrow) between the right common iliac artery (asterisk) and the intervertebral disc of L5-S1. b Anatomy seen in May Thurner Syndrome: Sagittal CT venogram of the pelvis shows compression of the left common iliac vein (arrow) between the right common iliac artery and the intervertebral disc of L5-S1, with acute thrombus in the lower IVC (asterisk). c Frontal iliocaval angiography shows extrinsic compression of the left common iliac vein (arrow). This anatomy is seen in patients with May-Thurner Syndrome. d After placement of self-expanding 14 mm venous stent, improvement in flow is seen as well as resolution of extrinsic compression on the left common iliac vein