Table 1 General information table

Gender

 Male

27(84.4)

55(78.6%)

0.493

 Female

5(15.6)

15(21.4%)

Age

65.5(58.5–73.5)

65.0(55.0–72.0)

0.564

Basic disease

17(53.1%)

26(37.1%)

0.129

Characteristics of surgical specimens

 Histological variation(%)

 Squamous differentiation

2(6.2%)

5(7.1%)

0.761

 Adenal differentiation

0

1(1.4%)

 Giant cell type

0

0

 Lymphomatoid and plasmacytoid changes

0

1(1.4%)

 intravascular tumour embolism or invasion

7(21.9)

28(40.0%)

0.074

 Nerve invasion

2(6.2)

11(15.7)

0.220

Pathological stage

 T2N0M0

29(90.6)

65(92.9)

0.703

 T3NOMO

3(9.4)

5(7.1)