Table 1.

Clinicopathological characteristics

Characteristics	Cases (63)
Age (years)
<60	23
≥60	40
Gender
Male	51
Female	12
Tumor size(cm)
≤ 3	21
>3	42
TNM tumor stage
I+II	44
III+IV	19
Histology
Adenocarcinoma	30
Squamous cell carcinoma	25
Other	8
Degree of differentiation
Well	18
moderately	27
Poorly	18
Lymph node metastasis
Yes	43
No	20
Smoking history
Yes	33
No	30