Churg-Strauss syndrome is a rare primary vasculitis called allergic granulomatosis angiitis. There is a substantial overlap of symptoms or signs between different vasculitides, so that a diagnosis of any vasculitis can be determined by a combination of clinical symptoms and laboratory tests. We report a case of a 54-year-old woman who had bronchial asthma, eosinophilia, peripheral polyneuropathy, pulmonary infiltrate, maxillary sinusitis, and extravascular eosinophilic infiltration on skin biopsy. So she was diagnosed as having Churg-Strauss syndrome, but she was antineutrophil cytoplasmic antibodies-negative on immunologic study. She had fever and showed cardiac involvement that was presented as cardiomegaly and pulmonary edema at chest radiography and left ventricular hypertrophy on electrocardiography. After steroid therapy, general condition and skin manifestation were rapidly improved.
