Target Volume Determination 2015

Do we need to treat the neck electively?

Risks of cN0 disease

N0 > N+ with no neck treatment

cN0 , pN+

Tumor site

cN0

Oral cavity Oropharynx Hypopharynx

35-70% 17-63% 28-48% 46-69% 10-14%

19-54%

17-52% 16-25% No data

22% 38%

Larynx: supraglottis

16-26% No data

33%

Nasopharynx

19-50%

#2 : risk of regional failure

#1 : risk of occult metastases

ELECTIVE NECK IRRADIATION

Mendenhall et al. Head Neck Surg 1980; 3:15-20.