Pulmonary emboli caused by iliac compression syndrome without leg symptoms.

Iliac compression syndrome is a clinical condition that occurs as a result of compression of the left common iliac vein by the overlying right common iliac artery. This syndrome most often affects young to middle-aged women, and patients usually have left leg symptoms. We report the unusual case of an 18-year-old male who had pulmonary emboli caused by iliac compression syndrome without leg symptoms. Combined venography and aortography confirmed the diagnosis. The patient was successfully treated with anticoagulants and vena cava filter insertion. Iliac compression syndrome should be considered when pulmonary embolism appears without obvious cause.