Table 1.

Clinicopathological characteristics.

Characteristics	Number	%
Age
Median (range)	66 (42–87)
Gender
Male	156	81.3
Female	36	18.8
Location
Upper	24	12.5
Middle	76	39.6
Lower	92	47.9
pT
2	30	15.6
3	156	81.3
4	6	3.1
pN
0	50	26.0
1	59	30.7
2	61	31.8
3	22	11.5
pM
0	175	91.1
1	17	8.9
TNM stage
I	7	3.6
II	50	26.0
III	118	61.5
IV	17	8.9
Histological grade
Grade 1	46	24.0
Grade 2	126	65.6
Grade 3	20	10.4