Endoscopic Submucosal Dissection for Large Colorectal Tumor in a Japanese General Hospital
Table 1
Clinical characteristics of 608 colorectal ESDs divided into 2 separate groups.
Group A (20–49 mm)
Group B (≧50)
Total ESDs
511
97
Age, y.o., mean ± SD
Tumor size, mm, mean ± SD
Tumor location
Cecum
67
17
Right colon
254
49
Left colon
169
18
Rectum
88
30
Macroscopic type
LST-G
205
80
LST-NG
260
13
Protruded
40
4
Recurrent
6
0
Histology
Adenoma
289
43
Mucosal cancer
120
28
SM1 cancer
39
8
SM2 cancer
20
10
Serrated or nonneoplastic lesions
43
2
En bloc resection rate, %
99.2
99.0
Curative resection rate, %
94.7
88.7
Procedure time, min, mean ± SD
Complication, no. (%)
Immediate perforation
13 (2.5%)
8 (8.2%)
Delayed perforation
1 (0.2%)
0 (0%)
Bleeding
6 (1.2%)
1 (1.0%)
Others
1 (0.2%)
ESDs: endoscopic submucosal dissections, LST-G: granular -type laterally spreading tumor, SD: standard deviation, SM1: submucosal invasion less than 1000 m from the muscularis mucosae, and SM2: submucosal invasion 1000 m or more from the muscularis mucosae.
