Table 2 Clinicopathological summary of the cases

Site

   Left side

12

41

0.068

   Right side

3

34

Histological type

   Well differentiated

6

30

   Moderately differentiated

4

37

   Poorly differentiated (including signet-ring cell carcinoma)

5

8

Depth of invasion

   Up to MP

2

12

0.79

   SS/A or deeper

13

63

Lymph node metastasis

   Negative

5

31

0.56

   Positive

10

44

Stage

   I

2

9

0.14

   II

3

22

   III

9

44

   IV

1

0