| High risk | Intermediate risk | Low risk | p | |
| n = 36 | n = 29 | n = 23 | ||
| VEGF-A and Ki-67 | 0.002 | |||
| Both high | 2 (5.6) | 5 (17.2) | 4 (17.4) | |
| Either high | 23 (63.9) | 5 (17.2) | 8 (34.8) | |
| Neither high | 11 (30.6) | 19 (65.5) | 11 (47.8) | |
| Neck management | ||||
| END + Adj Tx | 17 (47.2) | ? | ? | 0.000 |
| ENI | 11 (30.6) | 15 (51.7) | 7 (30.4) | |
| END | 8 (22.2) | 14 (48.3) | ? | |
| Observation | ? | ? | 16 (69.6) |