| Common underlying diseases |
| Pulmonary tuberculosis |
| Nontuberculous mycobacterial infection |
| Allergic bronchopulmonary aspergillosis |
| Treated lung cancer |
| Pneumothorax (often related to a bulla) |
| Chronic obstructive pulmonary disease |
| Sarcoidosis (stage II/III) |
| Uncommon underlying diseases |
| Rheumatoid arthritis with pulmonary nodules |
| Ankylosing spondylitis |
| Thoracic surgery |
| Asthma |
| Radiotherapy to the thorax or chest wall |
| Community-acquired pneumonia |
| Invasive pulmonary aspergillosis |
| Cannabis lung |
| Pneumoconiosis |
| Histoplasmosis |
| Silicosis |
