834 Long-Term Outcomes of 844 Patients Who Underwent Endoscopic Submucosal Dissection for Colorectal Neoplasms: Results From a Japanese Multicenter Cohort Study

Abstract

834 Long-Term Outcomes of 844 Patients Who Underwent Endoscopic Submucosal Dissection for Colorectal Neoplasms: Results From a Japanese Multicenter Cohort Study Kinichi Hotta*, Yutaka Saito, Toshio Uraoka, Yuichiro Yamaguchi, Naoto Sakamoto, Hiroaki Ikematsu, Masakatsu Fukuzawa, Nozomu Kobayashi, Junichiro Nasu, Tomoki Michida, Hisatomo Ikehara, Yosuke Otake, Takeshi Nakajima, Takahisa Matsuda, Masayoshi Yamada, Keita Harada, Tomoaki Shinohara, Shinichiro Hori, Shigeaki Yoshida Division of Endoscopy, Shizuoka Cancer Center, Shizuoka, Japan; Endoscopy division, National Cancer Center Hospital, Tokyo, Japan; Keio University, Tokyo, Japan; Juntendo University, Tokyo, Japan; National Cancer Center Hospital East, Kashiwa, Japan; Tokyo Medical University, Tokyo, Japan; Tochigi Cancer Center, Utsunomiya, Japan; Okayama University Hospital, Okayama, Japan; Osaka Koseinenkin Hospital, Osaka, Japan; Hyogo College of Medicine, Nishinomiya, Japan; Saku Centrao Hospital, Saku, Japan; Shikoku Cancer Center, Matsuyama, Japan; Aomori Prefectural Central Hospital, Aomori, Japan Background: The introduction of endoscopic submucosal dissection (ESD) was extremely important for the treatment of large colorectal neoplasms. However,