• Colorectal endoscopic submucosal dissection (ESD);
  • questionnaire survey study;
  • Japan and Asia;
  • technical standardization;
  • colon;
  • rectum;
  • complication

Aim:  The primary purpose of this questionnaire survey study was to determine the current status of colorectal endoscopic submucosal dissection (ESD) in specialized Japanese referral centers before and after introduction of a government-approved advanced medical treatment system; and, secondly, to determine the current status of colorectal ESD in other Asian specialized referral centers.

Methods:  A total of 1321 colorectal ESDs were performed in 11 institutions including two Asian centers outside Japan.

Results:  Overall en-bloc resection, curative resection, R0 resection, perforation, delayed bleeding and emergency surgery rates were 95.4%, 89.1%, 87.2%, 2.9%, 2.5% and 0.2%, respectively. Similar clinical results were reported in the two Asian centers.

Conclusion:  There were no significant differences with regards to clinical results between the two periods although the perforation rate decreased from 3.3% to 2.4%. In addition, colorectal ESD has become increasingly standardized technically at specialized referral centers not only in Japan, but several other Asian referral institutions as well.