519 / 1481
Guidelines 2003: N0
(Appendix 2)
• 6 node levels (Ia, Ib, IIa, IIb, III-VI) and
retropharyngeal nodes.
• CT-based boundaries of each node
level as a part of the CTV.
• Conformal (3DCRT and/or IMRT)
radiation therapy.
• Not for diagnosis, surgery or prediction
of nodal involvement.