From: PET-CT staging of the neck in cancers of the oropharynx: patterns of regional and retropharyngeal nodal metastasis
Distribution
Ipsilateral
Lymphadenopathy
Contralateral
Level
Frequency
Percent
Level I
2
3.8%
1
1.9%
Level II
40
75.5%
16
30.2%
Level III
23
43.4%
Level IV
5
9.4%
0
0%
Level V
3.77%