537 / 1311
Gregoire
et al.
Radiother Oncol
2000; 56:135-50.
Tumor site
Level I
Level II
Level III
Level IV
Level V
Retropharyngeal
Oral cavity
+
+
+
+
a
-
-
Oropharynx
-
+
+
+
-
+
b
Hypopharynx
c
-
+
+
+
-
-
Larynx
d
-
+
+
+
-
-
Nasopharynx
-
+
+
+
+
+
Selecting the lymph node level for the CTV of N0-1 neck
a
For tumors of the anterior tongue.
b
For tumors of the posterior pharyngeal wall.
c
Level VI for for esophageal extension.
d
Level VI for transglottic and subglottic tumors.
How do we define the CTV of elective neck? cN0