Table 1 Characteristics of EGCs between useful and useless groups

Number of cases

42

67

Sex (Male/Female)

34/8

53/14

N.S.

Age (years)

71.7 ± 7.4

68.6 ± 10.8

N.S.

Tumor location (U/M/L)

9/16/17

12/18/37

N.S.

Tumor diameter (mm, mean ± SD)

17.5 ± 13.8

19.7 ± 10.1

N.S.

Macroscopic type (protruded or flat elevated/depressed)

23/19

18/49

<0.01

Color (reddish/normal & pale)

12/30

31/36

N.S.

Atrophic border (oral side/anal side of tumor)

38/4

46/21

<0.01

Intestinal metaplasia around tumor (present/absent)

10/32

12/55

N.S.

Histologic type (intestinal/diffuse)

41/1

55/12

<0.05

Mucin phenotype (G-type/I-type/M-type)

14/17/11

18/32/17

N.S.

Depth (intramucosal/submucosal)

38/4

53/14

N.S.

Ulceration (+/−)

1/41

8/59

N.S.

Visibility of DL with indigo carmine only (good/bad)

4/38

13/54

N.S.