The external iliac vein is part of the human vascular system. It is an extension of the femoral vein, which is one of the lower leg’s deep veins. This vein travels up through the upper thigh as the ...

May-Thurner syndrome occurs when a vein in the pelvis becomes compressed by an artery. It often does not cause symptoms, but it can narrow the vein and impair blood flow, which raises the risk of deep ...