538 / 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
+
+
+
+
+
+
Hypopharynx
b
+
+
+
+
+
+
Larynx
c
±
+
+
+
+
-
Nasopharynx
+
+
+
+
+
+
Selecting the lymph node level for the CTV of elective neck
in N2b neck
a
May be omitted if only levels I-III are involved.
b
Level VI for for esophageal extension.
c
Level VI for transglottic and subglottic tumors.
How do we define the CTV of elective neck? N+