Table 5.
Comparison of staging system designed by authors and designed by Bhattacharyya.17
| Designed by authors | Bhattacharyya proposal | ||
|---|---|---|---|
| Stage | 5-Year OS | 5-Year OS | |
| I – limited to trachea | 60% | I – primary tumor confined to trachea, size <2 cm, no evidence of regional nodal disease | 52.8% |
| II – primary tumor confined to trachea, size >2 cm, no evidence of regional nodal disease | 70% | ||
| II – limited to chest | 14% | III – spread outside the trachea but not adjacent organs of structures, no evidence of regional nodal disease | 75% |
| IV – spread to adjacent organs of structures, no evidence of regional nodal disease | 15% | ||
| IIIA – limited to chest + mediastinal lymph nodes involvement | 12% | IV – evidence of regional nodal disease | |
| IIIB – limited to chest + supraclavicular lymph nodes involvement | 0% | ||
| IV – metastatic disease | 0% | None |