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% |