Target Volume Determination 2015

How do we define the CTV of elective neck?

Cervical lymph nodes by level used for neck dissection (Appendix 2)

Level

Lymph nodes

Nodal group

Submental nodes

Level Ia

Submental-submandibular

Level Ib Submandibular nodes Level II

High deep cervical chain nodes

Level III Middle deep cervical chain nodes

Level IV Low deep cervical chain nodes Level V Spinal accessory chain nodes Transverse cervical chain nodes

Deep lateral cervical

Pretracheal nodes Prelaryngeal nodes Paratracheal nodes

Level VI

Anterior cervical

Parotid and retropharyngeal nodal groups are not incorporated. Shah et al. Clin Bull 1981;11:25-33.