title: The Effect of Indigocarmine on Improvement of the Polyp Detection Rate during Colonoscopic Examination with Hood Cap.
abstract: OBJECTIVE
  Hood cap-assisted chromocolonoscopy using indigocarmine is expected to improve the detection rate of colorectal polyps, especially adenomatous polyps. Therefore, aim of the present study was to evaluate the usefulness of hood cap-assisted chromocolonoscopy in routine colonoscopic examinations.
  
  
  METHODS
  From January, 2013 through March, 2013, a total of 86 patients were enrolled (M:F=33:53, mean age=60 years). For each patient, hood cap-assisted colonoscopic examination was performed, followed by hood cap-assisted chromocolonoscopy using 0.2% indigocarmine from the cecum to the hepatic flexure. Total numbers and characteristics of polyps were compared before and after indigo carmine dye spraying.
  
  
  RESULTS
  Prior to dye spraying, 48 polyps were found in 37 patients, and after dye spraying, 53 additional polyps were found in 34 patients. Of these undetected polyps, 45 (85%) were small sized polyps (≤0.5 cm). Histologically, 19 (36%) were adenomatous polyps, and of these, 15 (28%) were tubular adenomas and 4 (8%) were serrated adenomas. As for the polyp detection rate, there was no difference between the expert and the non-expert groups.
  
  
  CONCLUSIONS
  Hood cap-assisted chromocolonoscopic examination using indigocarmine was helpful in detecting cecum and ascending colon polyps, especially small sized polyps (<0.5 cm) and neoplastic polyps.
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Busan Saint Mary's Hospital, Busan, Korea.
authors.forename: Sang Chang
authors.initials: SC
authors.lastname: Kwon
authors.affiliation: Department of Internal Medicine, Guposungsim Hospital, Busan, Korea.
authors.forename: Sung Won
authors.initials: SW
authors.lastname: Choi
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Busan Saint Mary's Hospital, Busan, Korea.
authors.forename: Seong Ho
authors.initials: SH
authors.lastname: Choi
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Busan Saint Mary's Hospital, Busan, Korea.
authors.forename: Hee Seung
authors.initials: HS
authors.lastname: Park
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Busan Saint Mary's Hospital, Busan, Korea.
authors.forename: Seung Heon
authors.initials: SH
authors.lastname: Lee
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Busan Saint Mary's Hospital, Busan, Korea.
authors.forename: Bong Gun
authors.initials: BG
authors.lastname: Kim
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Busan Saint Mary's Hospital, Busan, Korea.
authors.forename: Eun Hee
authors.initials: EH
authors.lastname: Seo
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Busan Saint Mary's Hospital, Busan, Korea.
authors.forename: Mun
authors.initials: M
authors.lastname: Jang
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Busan Saint Mary's Hospital, Busan, Korea.
authors.forename: Seung Min
authors.initials: SM
authors.lastname: Ryu
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Busan Saint Mary's Hospital, Busan, Korea.
authors.forename: Dong Hyun
authors.initials: DH
authors.lastname: Kim
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Busan Saint Mary's Hospital, Busan, Korea.
authors.forename: Young Hoon
authors.initials: YH
authors.lastname: Kim
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Busan Saint Mary's Hospital, Busan, Korea.
authors.forename: Jun Ouk
authors.initials: JO
authors.lastname: Ha
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Busan Saint Mary's Hospital, Busan, Korea.
authors.forename: Jae Seung
authors.initials: JS
authors.lastname: Lee
keywords: Adenoma; Colonoscopy; Hood cap; Indigocarmine; Polyps