Iliac vein compression and pulmonary embolism in a long distance runner: computed tomography and magnetic resonance imaging-a case report.

Iliac vein compression is invoked as the explanation for deep venous thrombosis occurring more often in the left iliofemoral system than the right. The authors report a previously undescribed variant of iliac compression whereby a left iliac arterial aneurysm caused venous compression and resultant thrombosis. In this case the patient suffered a pulmonary embolism without symptoms of lower extremity venous thrombosis.