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Table 15 Guidelines for contouring neck levels (negative on the 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 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
(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
T3-4 II-IV (bil) VI, VII, RP only if ext to pharynx