536 / 1311
Gregoire
et al.
Radiother Oncol
2000; 56:135-50.
Eisbruch
et al.
Semin Radiat Oncol
2002;12:2380-49.
Level I
Level II
Level III
Level IV
Level V
Retropharyngeal
Incidence of cN0
98/100 29/79 52/90
82/93 85/96
98/0
Probability of occult
nodal metastases
<5%
>5%
>5%
>5%
>5%
ipsi
<5%
To be included in the
CTV
-
+
+
+
±
-
Selecting the lymph node level for the CTV of N0 neck:
on the example of cancer of the supraglottic larynx
How do we define the CTV of elective neck? cN0