Olympus medical systems corp.(omsc) received a literature title "single-center implementation of endoscopic submucosal dissection (esd) in colorectum: low recurrence rate after intention-to-treat esd".The literature reported the result of 83 cases of the endoscopic submucosal dissection intention-to-treat (esd-itt) using olympus instruments (unspecified dual knife, unspecified hook knife, unspecified coagrasper forceps and monofil snares) between november, 2009 and june, 2016.In the 83 cases of the esd-itt, the eight patients developed complications.Six patients developed transmural microperforations.Five of them recovered by tightly clipping without clinical consequences.One patient had a small retroperitoneal perforation in the hepatic flexure was diagnosed and tightly clipped with delay.After 12 hours, however, the patient underwent right-sided hemicolectomy because of rising inflammatory parameters in the presence of retroperitoneal and mediastinal emphysema.All of six patients were discharged within 10 days after the esd-itt.And one patient developed delayed bleeding, but recovered without long-term morbidity.In addition, one patient developed anorectal stenosis, but cured with two sessions of balloon dilation.Further detailed information could not be obtained from the user facility at present.According to the number of patients and devices, omsc is submitting 32 medical device reports.This report is 32 of 32 reports for anorectal stenosis at monofil snares.
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