Temporary vena cava filters do not always protect from fatal pulmonary embolism

We describe the case of a young woman who developed fatal pulmonary embolism during thrombolytic therapy of a deep pelvic and leg vein thrombosis, despite the insertion of a temporary vena cava filter: So the opinion that the insertion of inferior vena cava filters always prevents lethal pulmonary embolism caused by thrombi of the deep vein system must be revised.