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YES
Bilateral
irradiation of
the neck is
mandatory
Primary tumour site is:
- Floor of mouth
- Lateral tongue
- Retromolar trigonum
- Cheek
- Tonsil
YES
Unilateral
irradiation of
the neck is
mandatory
NO
Tumourextension
across the midline?
Ipsilateral pN0 neck
NO
Ipsilateral pN+ neck
Contralateral pN+ neck
Contralateral cN0 neck
Contralateral pN0 neck
Tumourextension less
than 1 cm from the
midline?
Contralateral pN0 neck
NO
YES
NO
YES
Unilateral or
bilateral
elective
irradiation
Guidelines: Do they work?