Target Volume Determination 2015
How do we define the CTV of elective neck? N+
Selecting the lymph node level for the CTV of elective neck in N2b neck
Tumor site
Level I Level II Level III Level IV Level V Retropharyngeal
+ a
+
+
+
+
-
Oral cavity
+
+
+
+
+
+
Oropharynx
+
+
+
+
+
+
Hypopharynx b
±
+
+
+
+
-
Larynx c
+
+
+
+
+
+
Nasopharynx
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.
Gregoire et al. Radiother Oncol 2000; 56:135-50.
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