Table 3.

Selection of selective nodal clinical target volume (CTV)

	Nodal CTV0	Nodal CTV1	Nodal CTV2
Subclinical disease risk	<10%	10%-25%	>25%
Prescribed radiation dose	<35 Gy (a)	50 Gy	66-70 Gy
Levels dissected	Negative level with sufficient dissection	Negative and/or positive level without risk factors with insufficient dissection	Positive level with risk factors
	Positive level without risk factors	Adjacent negative level to nodal CTV2 (ECS and/or pN3)
Levels not dissected	-	Ipsilateral: Non-dissected level adjacent to infiltrated dissected level	-
	-	Contralateral: Levels with risk factors	-

(a) Referred to mean dose < 35 Gy.

Abbreviations: ECS = Extracapsular spread; pN = pathological nodal stage.