A Rare Case of Löffler "Pancarditis" Associated with Hypereosinophilic Syndrome.

A 53-year-old woman was admitted to another hospital because of a 2-month history of repeated chest pain and breathlessness. Laboratory examinations demonstrated the presence of hypereosinophilia (absolute count of 6,500/μL). An endomyocardial biopsy confirmed eosinophilic infiltration with myocardial destruction. On cardiac magnetic resonance imaging, late gadolinium enhancement was clearly observed along the visceral pericardium as well as on the endocardial layer. Based on the multimodal imaging and histopathological findings, the final diagnosis of "Loffler pancarditis" was made. After the introduction of steroid therapy, the left ventricular contractile function significantly recovered. Furthermore, the late gadolinium enhancement of the visceral pericardium had attenuated.