Table 1.

The clinical characteristics of all patients

Clinicopathological features	Numbers
Age (years)
< 60	28
≥ 60	52
Gender
Male	45
Female	35
Differentiation
Well	43
Moderate + Poor	37
Depth of invasion
T1	8
T2	54
T3	13
T4	5
Lymph node metastasis
N0	19
N1	22
N2	32
N3	7
Distant metastasis
M0	68
M1	12
TNM stage
I	23
II	32
III	13
IV	12