May–Thurner syndrome caused by a huge uterine myoma

May–Thurner syndrome (or iliocaval compression syndrome) is defined as a compression of the iliac vein that results in decreased flow in the vein and the left lower extremity due to a vascular malformation. It may result in left leg edema, pain, iliofemoral DVT, and postthrombotic syndrome. Compression of the left common iliac vein by the right common iliac artery against the underlying fifth lumbar vertebra is the typical underlying malformation [1,2]. It is rarely diagnosed but is prevalent in postmortem examinations. Hence, it is thought to be underestimated. Various conditions resulting in compression of the left common iliac vein by the right common iliac artery and underlying spine which lead to the development of left femoral DVT have been reported, including prolonged immobilization, dehydration, contractive therapy, surgical procedures for abdominal, gynecological, or spinal pathology, multiple pregnancies, and postpartum conditions [2-6]. However, May– Thurner syndrome secondary to a huge uterine myoma has not been reported previously.