| Diagnosis at surgical resection | N (%) |
| Primary lung adenocarcinoma | 47 (39.5) |
| Squamous cell carcinoma | 45 (37.8) |
| Large cell carcinoma | 11 (9.2) |
| Adenosquamous carcinoma | 3 (2.5) |
| Carcinoid tumour | 2 (1.68) |
| Melanoma | 1 (0.84) |
| Small and large cell carcinoma | 1 (0.84) |
| Metastatic colon cancer | 1 (0.84) |
| Non-specific inflammation | 1 (0.84) |
| Tuberculoma | 1 (0.84) |
| Chronic inflammation | 1 (0.84) |
| Pulmonary infarct secondary to Churg–Strauss syndrome | 1 (0.84) |
| Aspiration pneumonia | 1 (0.84) |