Table 1 Pathological stages of patients based on each pathological N factor
From: Sialyl Lewis X as a predictor of skip N2 metastasis in clinical stage IA non-small cell lung cancer
| Â | Number of patients | |||
|---|---|---|---|---|
| Â | Pathological N0 | Pathological N1 | Skip N2 | Non-skip N2 |
Pathological stage | Â | Â | Â | Â |
  IA/IB | 189/31 | 0/0 | 0/0 | 0/0 |
  IIA/IIB | 0/4 | 17/0 | 0/0 | 0/0 |
  IIIA | 6 | 0 | 12 | 20 |