May-Thurner syndrome

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[edit] Discussion of May-Thurner syndrome

  • May-Thurner syndrome is caused by compression of the left common iliac vein by the right common iliac artery.
  • May-Thurner sydrome may lead to leg swelling, varicosities, deep vein thrombosis, chronic venous stasis ulcers, or more serious complications, such as pulmonary embolism.
  • May-Thurner syndrome has been estimated to occur in 2%–5% of patients who undergo evaluation for lower extremity venous disorders,
  • It is not known why the normal anatomic relationship between the left common iliac vein and right common iliac artery is disrupted and begins to interfere with venous flow.


  • May-Thurner syndrome is a progressive disease with substantial long-term disabling complications.
  • An aggressive approach designed to relieve the mechanical compression should be strongly considered.

[edit] Imaging Findings for May-Thurner syndrome

  • An iliac venogram remains the diagnostic test of choice
    • Demonstrates the compression itself
    • Pressure gradient measurement can be performed to confirm the hemodynamic significance of the compression.
  • An additional and important diagnostic finding is the presence of tortuous venous collaterals crossing the pelvis to join contralateral veins.

[edit] Images

Patient #1

[edit] See Also

[edit] External Links

Goldminer: May-Thurner syndrome

May-Thurner Support Group

[edit] References for May-Thurner syndrome