title: Increased Detection of Colorectal Polyps in Screening Colonoscopy Using High Definition i-SCAN Compared with Standard White Light.
abstract: OBJECTIVE
  The aim of this study was to evaluate the efficacy of high definition (HD) i-SCAN for colorectal polyp detection in screening colonoscopy.
  
  
  METHODS
  We retrospectively analyzed the records of 501 patients who had undergone screening colonoscopy performed by three endoscopists with either HD i-SCAN (n=149) or standard white light (n=352) from January 2, 2014 through June 30, 2014. Patient information and inter-endoscopist variation as well as polyp number, endoscopic findings, and pathologic characteristics were reviewed.
  
  
  RESULTS
  The detection rates of colorectal and neoplastic polyps were significantly higher using HD i-SCAN than standard white light colonoscopy (52% vs. 38.1%, p=0.004 for colorectal polyps; and 37.2% vs. 27.9%, p=0.041 for neoplastic polyps). Analysis of endoscopic findings revealed no difference in detected polyp size between HD i-SCAN and standard white light colonoscopy (4.59±2.35 mm vs. 4.82±2.81 mm, p=0.739), but non-protruding polyps were more commonly detected by i-SCAN than by standard white light colonoscopy (24.6% vs. 13.5%, p=0.007).
  
  
  CONCLUSIONS
  Colonoscopy using HD i-SCAN had a significantly higher detection rate of colorectal polyps, including neoplastic polyps, because of improved sensitivity for detecting non-protruding lesions.
authors: Division of Gastroenterology and Hepatology, Department of Internal Medicine, Hallym Hospital, Incheon, Korea.
authors: Woo Jung
authors: WJ
authors: Kim
authors: Division of Gastroenterology and Hepatology, Department of Internal Medicine, Hallym Hospital, Incheon, Korea.
authors: Sang Young
authors: SY
authors: Park
authors: Division of Gastroenterology and Hepatology, Department of Internal Medicine, Hallym Hospital, Incheon, Korea.
authors: Iksoo
authors: I
authors: Park
authors: Division of Gastroenterology and Hepatology, Department of Internal Medicine, Hallym Hospital, Incheon, Korea.
authors: Wook Jin
authors: WJ
authors: Lee
authors: Division of Gastroenterology and Hepatology, Department of Internal Medicine, Hallym Hospital, Incheon, Korea.
authors: Jaechan
authors: J
authors: Park
authors: Division of Gastroenterology and Hepatology, Department of Internal Medicine, Hallym Hospital, Incheon, Korea.
authors: Nuri
authors: N
authors: Chon
authors: Division of Gastroenterology and Hepatology, Department of Internal Medicine, Hallym Hospital, Incheon, Korea.
authors: Tak Geun
authors: TG
authors: Oh
authors: Division of Gastroenterology and Hepatology, Department of Internal Medicine, Hallym Hospital, Incheon, Korea.
authors: Kwang Hyun
authors: KH
authors: Kim
keywords: Chromoendoscopy; Colonic polyps; Colonoscopy; i-SCAN