From: Oropharyngeal squamous cell carcinoma with known human papillomavirus status treated with definitive chemoradiotherapy: patterns of failure and toxicity outcomes
N Classification
T Classification
HPV-Positive
T1
T2
T3
T4
N0
2
N1
3
N2a
6
1
N2b
18
15
7
N2c
4
8
5
N3
HPV-Negative
0