Table II.
Histological features.
| Parameter | NAC (n=16) | NACRT (n=10) | P-value |
|---|---|---|---|
| Median T depth, mm (range) | 6.0 (0–19) | 6.8 (1–23) | 0.75 |
| Median F depth, mm (range) | 10.0 (3–20) | 10.5 (5–30) | 0.34 |
| pF, n (%) | 0.05 | ||
| 1 (M-SM) | 1 (6.3) | 0 (0) | |
| 2 (MP) | 7 (43.8) | 1 (10) | |
| 3 (A) | 7 (43.8) | 9 (90) | |
| 4 (AI) | 1 (6.3) | 0 (0) | |
| pT, n (%) | 0.05 | ||
| 0 (pCR) | 2 (12.5) | 0 (0) | |
| 1 (M-SM) | 0 (0) | 3 (30) | |
| 2 (MP) | 7 (43.8) | 2 (20) | |
| 3 (A) | 7 (43.8) | 4 (40) | |
| 4 (AI) | 0 (0) | 1 (10) | |
| pN, n (%) | |||
| Pararectal (+) | 3 (18.8) | 4 (40) | 0.37 |
| Lateral (+)a | 0 (0) | 1 (16.7) | 0.29 |
aLLND case alone, NAC (n=15), NACRT (n=6). pF, pathological F; pT, pathological T; pN, pathological N; pCR, pathological complete response; M, mucosa; SM, submucosa; MP, muscularis propria; A, adventitia; AI, adjacent organ invasion.