title: Long-Term Outcome and Surveillance Colonoscopy after Successful Endoscopic Treatment of Large Sessile Colorectal Polyps.
abstract: OBJECTIVE
  Although there is a consensus about the need for surveillance colonoscopy after endoscopic resection, the interval remains controversial for large sessile colorectal polyps. The aim of this study was to evaluate the long-term outcome and the adequate surveillance colonoscopy interval required for sessile and flat colorectal polyps larger than 20 mm.
  
  
  METHODS
  A total of 204 patients with large sessile and flat polyps who received endoscopic treatment from May 2005 to November 2011 in a tertiary referral center were included.
  
  
  RESULTS
  The mean age was 65.1 years and 62.7% of the patients were male. The mean follow-up duration was 44.2 months and the median tumor size was 25 mm. One hundred and ten patients (53.9%) received a short interval surveillance colonoscopy (median interval of 6.3 months with range of 1-11 months) and 94 patients (46.1%) received a long interval surveillance colonoscopy (median interval of 13.6 months with range of 12-66 months). There were 14 patients (6.9%) who had local recurrence at the surveillance colonoscopy. Using multivariate regression analysis, a polyp size greater than 40 mm was shown to be independent risk factor for local recurrence. However, piecemeal resection and surveillance colonoscopy interval did not significantly influence local recurrence.
  
  
  CONCLUSIONS
  Endoscopic treatment of large sessile colorectal polyps shows a favorable long-term outcome. Further prospective study is mandatory to define an adequate interval of surveillance colonoscopy.
authors.affiliation: Department of Medicine, Graduate School, Yonsei University College of Medicine, Seoul, Korea.|Center for Cancer Prevention and Detection, National Cancer Center, Goyang, Korea.
authors.forename: Bun
authors.initials: B
authors.lastname: Kim
authors.affiliation: Department of Internal Medicine, Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: A Ra
authors.initials: AR
authors.lastname: Choi
authors.affiliation: Department of Internal Medicine, Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Soo Jung
authors.initials: SJ
authors.lastname: Park
authors.affiliation: Department of Internal Medicine, Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Jae Hee
authors.initials: JH
authors.lastname: Cheon
authors.affiliation: Department of Internal Medicine, Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Tae Il
authors.initials: TI
authors.lastname: Kim
authors.affiliation: Department of Internal Medicine, Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Won Ho
authors.initials: WH
authors.lastname: Kim
authors.affiliation: Department of Internal Medicine, Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Korea. sphong@yuhs.ac.
authors.forename: Sung Pil
authors.initials: SP
authors.lastname: Hong
mesh_terms: D000328:Adult; D000368:Aged; D003110:Colonic Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D003111:Colonic Polyps / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D003113:Colonoscopy; D000069916:Endoscopic Mucosal Resection; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000175:diagnosis*; D011446:Prospective Studies; D013997:Time Factors; D057832:Watchful Waiting / Q000379:methods*
keywords: Colorectal neoplasm; colonoscopy; gastrointestinal endoscopy