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Causes of hemidiaphragm depression
| Unilateral |
| Large pneumothorax |
| Asymmetrical bullous emphysema |
| Large pleural effusion |
| Foreign body aspiration |
| Congenital lobar emphysema |
| Single-lung transplantation for emphysema |
| Bilateral |
| Chronic obstructive pulmonary disease (emphysema, asthma) |
| Deep inspiration (young, thin person) |
| Bilateral large pneumothorax |
| Bilateral large pleural effusion |
| Mechanical ventilation at high pressures |
| Cystic fibrosis |
| Pulmonary histiocytosis X |
| Lymphangioleiomyomatosis |
