Table 1.

Clinical characteristics of the study subjects.

(1) Histology
Adenoma	44  (26%)
M ca†	66  (39%)
SM-S ca‡	15  (9%)
SM-M ca¶	39  (23%)
MP ca# or over	4  (3%)
(2) Location
Rectum	74  (44%)
Sigmoid	34 (20%)
Descending	10  (6%)
Transverse	21  (13%)
Ascending	20  (12%)
Cecum	9  (5%)
(3) Morphology
Protruded	20  (12%)
Superficial	13  (8%)
LST* granular	57  (34%)
LST* nongranular	74  (44%)
Others	4  (2%)
(4) Size (mm)
~9	14  (8%)
10~19	55  (33%)
20~	82  (49%)
unknown	17 (10%)

^†M ca: mucosal cancer, ^‡SM-S ca: submucosal slight invaded cancer.

^¶SM-M ca: submucosal massive invaded cancer.

^#MP ca: muscularis propria invaded cancer, *LST: laterally spreading tumor.