Pulmonary thromboembolism in a patient with idiopathic hypereosinophilic syndrome

We report a successful treatment in a patient with idiopathic hypereosinophilic syndrome (HES) presenting with left pulmonary truncal thromboembolism and right pleural effusion. A treatment with urokinase infusion by a Swan-Gants catheter near a left pulmonary thrombus was performed and left pulmonary arterial occlusions were recanalized completely. After corticosteroid therapy was started, right pleural effusion disappeared. Both anticoagulant and corticosteroid therapy was necessary for treatment in HES patients who had thromboembolic episodes.