| R− Sc+ (n) | R+ Sc+ (n) | R− Sc− (n) | |
| Histological type | |||
| Epidermoid carcinoma | 5 | 3 | 2 |
| Adenocarcinoma | 5 | 4 | 0 |
| Anaplastic small cell cancer | 0 | 1 | 2 |
| Large-cell neuro-endocrine carcinoma | 1 | 0 | 0 |
| Carcinoid | 1 | 0 | 0 |
| Stage | |||
| IA | 5 | 2 | 2 |
| IB | 1 | 3 | 0 |
| IIA | 0 | 1 | 0 |
| IIB | 0 | 0 | 0 |
| IIIA | 1 | 0 | 1 |
| IIIB | 1 | 1 | 0 |
| IV | 2 | 0 | 1 |
| Stage yet to be confirmed | 2 | 1 | 0 |
| Clinical characteristics | |||
| Symptomatic | 0 | 0 | 4 |
| Asymptomatic | 12 | 8 | 0 |
R−, negative chest radiograph; R+, positive chest radiograph; Sc−, negative CT scan; Sc+, positive CT scan.