[Idiopathic hypereosinophilic syndrome. Two patients with multiple organ damage].

The idiopathic hypereosinophilic syndrome is a disorder characterized by sustained overproduction of eosinophils with undetectable etiology in addition to specific organ damage. Multiple organ systems may be involved in this condition, including the heart, lungs, skin and nervous system. The most important cause of mortality is myocardial involvement combined with valvular insufficiency. However, the prognosis for these patients has been to a large extent improved by greater awareness of this condition, combined with better surgical techniques. We describe two cases that illustrate the complex clinical situations that may be encountered in these patients.