Table 6 Guidelines for contouring neck levels [57]
| Â | cNo | Ipsilateral N+ | Comment |
|---|---|---|---|
Tongue | Bilateral I-IV | V if N2-3 | Excluding IIb |
Floor of mouth (well lateralized) | Bilateral I-III | IV and V if N2-3 | Excluding IIb |
Hard palate | Bilateral Ib, IIa, III, RP | Add bilateral Ia, IV, V if N2-3 | Excluding IIb |
Upper retromolar trigone | Bilateral Ib, IIa, III, RP, ipsilateral Ia | Add contralateral Ia, bilateral IV and V | Excluding IIb |
Lower retromolar trigone | Ipsilateral I, II, III | Add ipsilateral IV, V | Excluding IIb |
Buccal mucosa | Ipsilateral Ib, IIa, III | Add ipsilateral Ia, bilateral IV and V | Excluding IIb |