Weighted scores for risk factors | |
Risk factors | Points |
Lymphatic invasion | 3 |
Lesion size >30 mm | 1 |
Positive vertical margin | 1 |
Venous invasion | 1 |
Submucosal invasion ≥500 μm | 1 |
Lymph node metastasis (LNM) risk groups | Points | Risk of LNM (%) | Cancer-specific 5-year survival (%) |
Low | 0–1 | 2.5 | 99.6 |
Intermediate | 2–4 | 6.7 | 96.0 |
High | 5–7 | 22.7 | 90.1 |