Table 2.
TNM‐based stage group and score for colorectal cancer patients.
| Stage Group | TNM* | Lymph Nodes Examined (Range) | Patient Number (%) | Score |
|---|---|---|---|---|
| 0 | Tis, NO, MO | 0 | 0 (0) | 1 |
| I | Tl‐2, NO, MO | 27 | 1 (9.1) | 2 |
| IIA | T3, NO, MO | 13–23 | 3 (27.3) | 3 |
| IIB | T4, NO, MO | 0 | 0 (0) | 4 |
| IIIA | Tl‐2, Nl, MO | 0 | 0 (0) | 5 |
| IIIB | T3‐4, Nl, MO | 9–29 | 4 (36.3) | 6 |
| IIIC | Tl‐4, N2, MO | 13–33 | 3 (27.3) | 7 |
| IV+ | Tl‐4, NO‐2, Ml | 0 | 0 | 8 |
*T categories are as described in Table 1; N0, no lymph nodes involvement; N1, metastasis in 1‐3 lymph nodes; N2, metastasis in ≥4 lymph nodes; M0, no distant metastasis; M1, metastasis at distant organs.
+ No patients were included in the stage IV group because almost universally the M category was not determined (Table I).