Table 1 Detailed distribution of the 331 cases with involved lymph nodes
Unilateral | Bilateral | Total percentage (%) | |
|---|---|---|---|
Rouviere's LN | 125 | 149 | 82.8 |
Medial group of pharynx LN | 1 | 0 | 0.3 |
Level Ib | 2 | 5 | 2.1 |
Level IIa | 105 | 30 | 40.8 |
Level IIb | 144 | 68 | 64.0 |
Level III | 101 | 14 | 34.7 |
Level IVa | 33 | 1 | 10.3 |
Level IVb | 1 | 0 | 0.3 |
Level Va | 35 | 2 | 11.2 |
Level Vb | 7 | 2 | 2.7 |
Level Vc | 3 | 0 | 0.9 |
Parotid LN | 12 | 0 | 3.6 |