| Patient characteristics | N = 52 |
| Age, mean (years) | 50.8 |
| Gender, no. (%) | |
| Male | 37 (71) |
| Female | 15 (29) |
| Preoperative diagnosis, no. (%) | |
| Lung Cancer | 8 (15) |
| Isolated lymphadenopathy | 27 (54) |
| Undetermined parenchymal mass | 17 (32) |