Table 2.
Postoperative pathological response
| Total (n=27) | pMMR (n=26) | dMMR (n=1) | |
| pCR (ypT0N0), n (%) | 13 (48.1) | 12 (46.2) | 1 (100.0) |
| T category, n (%) | |||
| ypT0 | 13 (48.1) | 12 (46.2) | 1 (100.0) |
| ypTis | 1 (3.7) | 1 (3.8) | 0 |
| ypT2 | 5 (18.5) | 5 (19.2) | 0 |
| ypT3 | 8 (29.6) | 8 (30.8) | 0 |
| N category, n (%) | |||
| ypN0 | 19 (70.4) | 18 (69.2) | 1 (100.0) |
| ypN1 | 6 (22.2) | 6 (23.1) | 0 |
| ypN2 | 2 (7.4) | 2 (7.7) | 0 |
| Pathological stage, n (%) | |||
| 0 | 14 (51.9) | 13 (50.0) | 1 (100.0) |
| I | 0 | 0 | 0 |
| II | 5 (18.5) | 5 (19.2) | 0 |
| III | 8 (29.6) | 8 (30.8) | 0 |
| Tumor regression grade, n (%) | |||
| 0 | 13 (48.1) | 12 (46.2) | 1 (100.0) |
| 1 | 5 (18.5) | 5 (19.2) | 0 |
| 2 | 7 (25.9) | 7 (26.9) | 0 |
| 3 | 2 (7.4) | 2 (7.7) | 0 |
dMMR, deficient mismatch repair; pMMR, proficient mismatch repair.