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Table 2 TNM Classification of patients by tumor HPV status

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

2

 

N2a

6

2

1

 

N2b

18

15

7

3

N2c

4

8

5

7

N3

3

5

3

3

HPV-Negative

    

N0

  

1

2

N1

  

1

2

N2a

  

1

 

N2b

2

1

1

2

N2c

1

0

3

3

N3

 

1

1

2

  1. P values for differences between T stage and N stage for HPV-positive and HPV-negative groups were p = < 0.001 and p = 0.71, respectively.