| Methods | Cases | % |
| Bronchoscopy | 410 | 31.8 |
| Percutaneous lung biopsy | 82 | 6.4 |
| Pleural biopsy | 23 | 1.8 |
| Lymph node biopsy | 20 | 1.6 |
| Pleural effusion | 61 | 4.7 |
| Surgery | 694 | 53.8 |