title: Coagulation syndrome: Delayed perforation after colorectal endoscopic treatments.
abstract: Various procedure-related adverse events related to colonoscopic treatment have been reported. Previous studies on the complications of colonoscopic treatment have focused primarily on perforation or bleeding. Coagulation syndrome (CS), which is synonymous with transmural burn syndrome following endoscopic treatment, is another typical adverse event. CS is the result of electrocoagulation injury to the bowel wall that induces a transmural burn and localized peritonitis resulting in serosal inflammation. CS occurs after polypectomy, endoscopic mucosal resection (EMR), and even endoscopic submucosal dissection (ESD). The occurrence of CS after polypectomy or EMR varies according previous reports; most report an occurrence rate around 1%. However, artificial ulcers after ESD are largely theoretical, and CS following ESD was reported in about 9% of cases, which is higher than that for CS after polypectomy or EMR. Most cases of post-polypectomy syndrome (PPS) have an excellent prognosis, and they are managed conservatively with medical therapy. PPS rarely develops into delayed perforation. Delayed perforation is a severe adverse event that often requires emergency surgery. Since few studies have reported on CS and delayed perforation associated with CS, we focused on CS after colonoscopic treatments in this review. Clinicians should consider delayed perforation in CS patients.
authors.affiliation: Kingo Hirasawa, Chiko Sato, Makomo Makazu, Hiroaki Kaneko, Ryosuke Kobayashi, Atsushi Kokawa, Division of Endoscopy, Yokohama City University Medical Center, Yokohama 232-0024, Japan.
authors.forename: Kingo
authors.initials: K
authors.lastname: Hirasawa
authors.affiliation: Kingo Hirasawa, Chiko Sato, Makomo Makazu, Hiroaki Kaneko, Ryosuke Kobayashi, Atsushi Kokawa, Division of Endoscopy, Yokohama City University Medical Center, Yokohama 232-0024, Japan.
authors.forename: Chiko
authors.initials: C
authors.lastname: Sato
authors.affiliation: Kingo Hirasawa, Chiko Sato, Makomo Makazu, Hiroaki Kaneko, Ryosuke Kobayashi, Atsushi Kokawa, Division of Endoscopy, Yokohama City University Medical Center, Yokohama 232-0024, Japan.
authors.forename: Makomo
authors.initials: M
authors.lastname: Makazu
authors.affiliation: Kingo Hirasawa, Chiko Sato, Makomo Makazu, Hiroaki Kaneko, Ryosuke Kobayashi, Atsushi Kokawa, Division of Endoscopy, Yokohama City University Medical Center, Yokohama 232-0024, Japan.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Kaneko
authors.affiliation: Kingo Hirasawa, Chiko Sato, Makomo Makazu, Hiroaki Kaneko, Ryosuke Kobayashi, Atsushi Kokawa, Division of Endoscopy, Yokohama City University Medical Center, Yokohama 232-0024, Japan.
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Kobayashi
authors.affiliation: Kingo Hirasawa, Chiko Sato, Makomo Makazu, Hiroaki Kaneko, Ryosuke Kobayashi, Atsushi Kokawa, Division of Endoscopy, Yokohama City University Medical Center, Yokohama 232-0024, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Kokawa
authors.affiliation: Kingo Hirasawa, Chiko Sato, Makomo Makazu, Hiroaki Kaneko, Ryosuke Kobayashi, Atsushi Kokawa, Division of Endoscopy, Yokohama City University Medical Center, Yokohama 232-0024, Japan.
authors.forename: Shin
authors.initials: S
authors.lastname: Maeda
keywords: Coagulation; Colorectal; Dissection; Endoscopy; Syndrome