Details on invasive procedures
| No. of nodes (mean) | PET-CT | Range | CWU | Range |
| Mediastinoscopy | N=89 | N=88 | ||
| N2 nodes evaluated | 1.3 | (0–7) | 1.4 | (0–7) |
| N3 nodes evaluated | 0.5 | (0–3) | 0.6 | (0–4) |
| Thoracotomy | N=60 | N=73 | ||
| N1 nodes evaluated | 4.1 | (0–19) | 3.8 | (0–13) |
| N2 nodes evaluated | 3.4 | (0–17) | 3.6 | (0–16) |
| EUS-FNA | N=40 | N=29 | ||
| 1 | 0.03 | (0–1) | 0 | – |
| 2–4R/L | 0.3 | (0–3) | 0.1 | (0–2) |
| 5–6 | 0 | – | 0.03 | (0–1) |
| 7 | 1.0 | (0–3) | 1.2 | (0–2) |
| 8–9 | 0.1 | (0–2) | 0.2 | (0–3) |
CWU, conventional work-up; EUS, endoscopic ultrasound; FNA, fine needle aspiration; PET, positron emission tomography.