iliac vein compression syndrome; May-Thurner syndrome

Epidemiology

• patients typically present in their 3rd, 4th, or 5th decade,
• female preponderance, with a 2:1 ratio

Pathology

• compression of the left iliac vein by the overlying right iliac artery
• left common iliac vein is most affected,
• left external iliac vein less commonly affected
• right iliac vein compression has also been described

Clinical manifestations

• repeated occurrence of deep vein thrombosis involving veins in the proximal left leg

Radiology

• ultrasonography imaging modality of choice
• angiography
• magnetic resonance imaging

More general terms

• syndrome