Table 2 Metastasis pattern in level 1b in patients with submandibular gland (SMG) preservation and SMG excision
| Groups of level 1b | SMG preservation (n = 6) | SMG excision (n = 18) | Overall rate (/137) |
|---|---|---|---|
| Superior | 3 | 8 | 8.0% |
| Anterior | 2 | 5 | 5.1% |
| Posterior | 1 | 3 | 2.9% |
| Inferior | 0 | 1 | 0.7% |
| Superficial | 0 | 1 | 0.7% |
| Deep | – | 0 | 0.0% |
| SMG | – | 0 | 0.0% |