Technical guidelines for head and neck cancer IMRT on behalf of the Italian association of radiation oncology - head and neck working group

Table 15 Guidelines for contouring neck levels (negative on the imaging)

Laryngeal Site	T stage	Levels to be included in CTV HR	Levels to be included in CTV LR	Remarks
Supraglottic	T1-2	II-III (bil)	IV (bil),
	T3-4	II-III (bil)	IV (bil), VI
			VII only if subglottic extension
			RP only if extension to pharynx
Glottic	T1	None
	T2	None/Questionable		Levels II and III if supragl ext Levels III and IV if subgl ext
	T2	(see text)
	T3-4	II-III (bil)	IV (bil), VI
			VII only if subGL ext
			RP only if ext to pharynx
Subglottic	T1-2	III-IV (bil)		VII optional
Subglottic	T3-4	II-IV (bil)	VI, VII, RP only if ext to pharynx

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