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Nodal distribution according to neck levels
| Node level | Clinically palpable node levels | Histopathological positive metastatic lymph nodes | ||
|---|---|---|---|---|
| Number | Percentage (%) | Number | Percentage (%) | |
| Level Ia | 14 | 8.1 | 6 | 4.9 |
| Level Ib | 134 | 77.4 | 56 | 46.2 |
| Level IIa | 22 | 12.7 | 40 | 33.1 |
| Level IIb | 2 | 1.1 | 4 | 3.3 |
| Level III | 1 | 0.5 | 10 | 8.2 |
| Level IV | 0 | 0 | 4 | 3.3 |
| Level V | 0 | 0 | 1 | 0.8 |
| 173 | 121 | |||
