Target Volume Determination 2015

How do we define the CTV of elective neck? cN0

Selecting the lymph node level for the CTV of N0 neck: on the example of cancer of the supraglottic larynx

Level I

Level II Level III Level IV Level V

Retropharyngeal

98/100 29/79 52/90

82/93 85/96

98/0

Incidence of cN0

Probability of occult nodal metastases To be included in the CTV

>5% ipsi

>5%

>5%

>5%

<5%

<5%

-

±

+

+

+

-

Gregoire et al. Radiother Oncol 2000; 56:135-50. Eisbruch et al. Semin Radiat Oncol 2002;12:2380-49.