Risk scoring system for lymph node metastasis in patients with newly diagnosed HNSCC
| Image Findings | Score |
|---|---|
| T-stage | |
| 1 or 2 | 0 |
| 3 or 4 | 1 |
| Shortest axial diameter (cm) | |
| <1 | 0 |
| 1–2 | 1 |
| ≥2 | 4 |
| L/S ratio | |
| <1.5 | 1 |
| ≥1.5 | 0 |
| Necrosis | |
| No | 0 |
| Yes | 3 |
| Total score | 9 |
| Risk classification by total risk scorea | |
| 0–1: low risk (≤17% of metastasis) | |
| 2–4: intermediate risk (17%∼78% of metastasis) | |
| 5–9: high risk (≥78 % of metastasis) |
↵a Estimated metastases for the each score in the risk groups were as follows: low-risk group (score zero, 7% and score one, 17 %), intermediate-risk group (score two, 35%; score three, 58%; and score four, 78%), and high-risk group (score five, 90%; score six, 96%; score seven, 98%; score eight, 99%; and score nine, 100%).