From: PET-CT staging of the neck in cancers of the oropharynx: patterns of regional and retropharyngeal nodal metastasis
Tumor Stage
Nodal Stage
T1
1/53
1.9%
N0
21/53
39.6%
T2
N1
8/53
15.1%
T3
24/53
45.3%
N2a
12/53
22.6%
T4
7/53
13.2%
N2b
4/53
7.6%
Early Stage
(I or II)
N2c
Late Stage (III or IV)
46/53
86.8%
N3