From: The checkpointkinase 2 (CHK2) 1100delC germ line mutation is not associated with the development of squamous cell carcinoma of the head and neck (SCCHN)
Tumor Stage
Oropharynx
n = 57
Hypopharynx
n = 12
Larynx
n = 22
T1
16
1
10
T2
21
8
6
T3
15
3
T4
5
2