Target Volume Determination 2015

How do we define the CTV of elective neck? cN0

cN0 neck in head-and-neck cancer per node level [%]

Tumor site

Level I

Level II Level III Level IV Level V

Others

Oral cavity

58/96.5* 21/92

82/97

95/99

99/0

98.6/99.7

Oropharynx

87/98

19/76

77/95

91/97.5

87/97

98/99

Hypopharynx

98/100

20/87

49/96

80/97

76/98

97/99

Larynx: Supraglottis 98/100

29/79

52/90

82/93

85/96

98/100

Nasopharynx

91/95

29/44

64/68

78/85

68/74

85/90

*ipsilateral/contralateral cervical lymph nodes

Gregoire et al. Radiother Oncol 2000; 56:135-50.