May-Thurner syndrome
Pronunciation: MAY-thur-ner
Compression of the left common iliac vein by the right common iliac artery, predisposing to venous thrombosis.
Full Definition
May-Thurner syndrome, also known as iliac vein compression syndrome, occurs when the right common iliac artery compresses the left common iliac vein against the lumbar vertebrae. This anatomical variant leads to chronic venous outflow obstruction, intimal hyperplasia, and increased risk of deep vein thrombosis, particularly in the left lower extremity. The condition is more commonly recognized in young women and may present with leg swelling, varicose veins, or acute deep vein thrombosis. Diagnosis is typically made with advanced imaging techniques such as CT venography or MR venography.
Usage
Usage note: Also known by eponyms Cockett syndrome or iliac vein compression syndrome.
In Context
- "CT venography demonstrated May-Thurner syndrome with significant compression of the left common iliac vein." — Radiology report
- "The patient's recurrent left leg DVT was attributed to underlying May-Thurner syndrome." — Hematology consultation