Widespread necrotizing angiitis with granulomas. Pulmonary involvement is frequent. Asthma or other respiratory infection may precede evidence of vasculitis. Eosinophilia and lung involvement differentiate this disease from polyarteritis nodosa.
This definition is at least in part based on: Anonymous (2021), Churg-Strauss syndrome (English). Medical Subject Headings. U.S. National Library of Medicine.