Table 1.
Classification of thoracic abnormal air collection based on anatomy
| Location | Anatomical structure and space | Disease of abnormal air collection |
|---|---|---|
| I. Pleural cavity | Anteromedial space | Pneumothorax in the anteromedial space (I-1) |
| Subpulmonary space | Pneumothorax in the subpulmonary space (I-2) | |
| Apicolateral space | Pneumothorax in the apicolateral space (I-3) | |
| Posteromedial space | Pneumothorax in the posteromedial space (I-4) | |
| (Emergency condition) | Tension pneumothorax (I-5) | |
| (Differential diagnosis) | Mimics of pneumothorax (I-6) | |
| II. Chest wall | Subcutaneous space | Subcutaneous emphysema (II-1) |
| Intrathoracic extrapleural space | Air collection in the intrathoracic extrapleural space (II-2) | |
| III. Mediastinum | Mediastinum | Pneumomediastinum (III-1) |
| Inferior pulmonary ligament | Air collection in the inferior pulmonary ligament (III-2) | |
| IV. Pericardium | Pericardium | Pneumopericardium (IV-1) |
| V. Lung | Interstitium | Pulmonary interstitial emphysema (V-1) |
| Parenchyma | Pneumatocele (V-2) |
The numbers in the parentheses correspond to the numbers in the text and figures