Table 2 Clinico-pathological characteristics and survival of the study population. The adjacent table is a summary of clinico-pathological data of interest in this study.

Number of patients

47

100

Tumor size, T

   T1 (≤ 2 cm)

20

43

   T2 (>2 cm, ≤ 5 cm)

22

47

   T3 (>5 cm)

5

11

Node status

   N(-)

26

55

   N(+)

21

45

Overall survival, years

   <10

27

64

   ≥ 10

15

36

Total evaluated

42

100

Relapse-free survival, years

   <10

29

69

   ≥ 10

13

31

Total evaluated

42

100