Typically a clinical diagnosis
Labs with elevated eosinophils, ESR, CRP, ANCA
CXR with transient, patchy opacities
Eosinophilic granulomatosis with polyangiitis
Aspirin-exacerbated respiratory disease
Granulomatosis with polyangiitis
Chronic eosinophilic pneumonia
Nephrogenic systemic fibrosis
Allergic bronchopulmonary aspergillosis
Thromboangiitis obliterans
Hypereosinophilic syndrome