Table 2. Tumor Characteristics on Pre- and Post-CRT MRI and Pathology.
| Pre-CRT MRI | Post-CRT MRI | Pathology | |||
|---|---|---|---|---|---|
| cT category | ycT category | ypT category | |||
| T0 | 7 | T0 | 7 | ||
| Tis | 9 | ||||
| T1 | 1 | T1 | 4 | T1 | 19 |
| T2 | 71 | T2 | 153 | T2 | 115 |
| T3a | 3 | T3a | 2 | T3a | 40 |
| T3b | 118 | T3b | 95 | T3b | 83 |
| T3c | 68 | T3c | 35 | T3c | 45 |
| T3d | 12 | T3d | 1 | T3d | - |
| T4a | 17 | T4a | 6 | T4a | 1 |
| T4b | 31 | T4b | 18 | T4b | 2 |
| cN category | ycN category | ypN category | |||
| Negative | 58 | Negative | 240 | Negative | 240 |
| Positive | 263 | Positive | 81 | Positive | 81 |
| Extramesorectal LNpre | Extramesorectal LNpost | yp-extramesorectal LN | |||
| Negative | 234 | Negative | 285 | Negative | 307 |
| Positive | 87 | Positive | 36 | Positive | 14 |
| EMDpre (mm) | EMDpost (mm) | ||||
| Mean, SD | 4.7, 5.1 | Mean, SD | 2.4, 3.4 | ||
| Range | 0–36.6 | Range | 0–19.2 | ||
| MRFpre (mm) | MRFpost (mm) | ||||
| Mean, SD | 5.7, 5.4 | Mean, SD | 6.5, 5.9 | ||
| Range | 0–24.3 | Range | 0–26.5 | ||
| EMVIpre | EMVIpost | ypEMVI | |||
| Negative | 279 | Negative | 294 | Negative | 320 |
| Positive | 42 | Positive | 27 | Positive | 1 |
EMD = extramural depth, EMDpost = EMD after CRT, EMDpre = EMD beforer CRT, EMVI = extramural venous invasion, EMVIpost = EMVI after CRT, EMVIpre = EMVI before CRT, LN = lymph node, LNpost = LN after CRT, LNpre = LN beforer CRT, MRF = mesorectal fascia, MRFpost = MRF after CRT, MRFpre = MRF beforer CRT