Table 4. Causes of hemorrhage.
| Source of hemorrhage | n | % |
| Thoracic wall | 10 | 24.4 |
| Mediastinal adipose tissue | 5 | 12.2 |
| Intercostal artery | 4 | 9.8 |
| Pulmonary artery stump | 3 | 7.3 |
| Lung parenchyma | 3 | 7.3 |
| Vena azygos | 1 | 2.4 |
| Unidentified focus | 15 | 36.6 |
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