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Table 16 Guidelines for contouring neck levels (positive on imaging)

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

Laryngeal Site TN stage Levels to be included in CTV 2 Levels to be included in CTV 3 Remarks
Supraglottic T1-2- N+ II-III (bil) IV bilat, V (on the side of positive neck)  
Glottis T2 N+ II-III (bil) IV bilat, V (on the side of positive neck)  
Subglottic T1-2 N+ III-IV (bil) V (on the side of positive neck),  
VII
Glottis/ T3-4 N+ II-IV (bil) IIb if IIa positive, VI,  
Supraglottic/ V (on the side of positive neck),
Subglottic IB only on the side level II is pos*,
VII only if subGL ext
RP only if ext to pharynx