Table 4. Modified ypTNM staging system with M-TTRG classification.
| Modified ypTNM Stage | M-TTRG | ypN | No. of patients | 3-year DFS rate | P |
|---|---|---|---|---|---|
| 0 | M-TTRG0 | N0 | 42 | 97.6% | <0.0001 |
| I | M-TTRG1 M-TTRG2 |
N0 | 99 | 84.6% | |
| IIA | M-TTRG3 M-TTRG4 |
N0 | 53 | 71.3% | |
| IIB | M-TTRG0 M-TTRG1 M-TTRG2 |
N1 | 56 | 65.3% | |
| IIIA | M-TTRG0 M-TTRG1 M-TTRG2 |
N2 | 38 | 47.7% | |
| IIIB | M-TTRG3 M-TTRG4 |
N1 | 21 | 42.6% | |
| IIIC | M-TTRG3 M-TTRG4 |
N2 | 20 | 38.9% |
Abbreviations: DFS, disease free survival; M-TTRG classification: modified ypT stage by combining ypT stage and TRG.