Differential diagnoses of systemic corticosteroid treated “severe asthma”
| Eosinophilic granulomatosis with polyangiitis (Churg–Strauss syndrome)# |
| Hypersensitivity pneumonitis (including hot tub lung)# |
| Chronic aspiration# |
| Sarcoidosis# |
| Allergic bronchopulmonary mycosis |
| Constrictive bronchiolitis# |
| Asthmatic granulomatosis# |
| Autoimmune airway disease# |
| Infectious diseases (atypical bacteria, fungal or nontuberculous mycobacteria) |
#: diseases where lung biopsies might be helpful in the diagnostic evaluation.