title: Injection-incision--assisted snare resection of large sessile colorectal polyps.
abstract: BACKGROUND
  It can be difficult, even for experienced endoscopists, to completely remove large sessile colorectal polyps. We attempted to remove large sessile colorectal polyps without complication and residual tumors.
  
  
  METHODS
  Our new technique is characterized by submucosal pre-injection with a large volume of saline solution and then circumferential incision outside the lesion before resection using a special needle-tipped snare. The mean size of 33 polyps (including 9 elevated sessile, 20 flat nodular [villous], and 4 flat sessile polyps), was 4.0 cm (range, 3.0-8.5 cm).
  
  
  RESULTS
  Twenty-five (76%) were resected piecemeal and the remainder as a single specimen. Mild to moderate bleeding occurred in 3 (9.1%), but there was no clinically significant bleeding or perforation. No residual or recurrent tumors were recognized. Invasive carcinoma was revealed most frequently (44%) in elevated sessile polyps; none occurred in flat nodular polyps.
  
  
  CONCLUSIONS
  Our removal technique appears to be safe and effective. Flat nodular polyps of any size are a particularly good indication for removal by this technique.
authors.affiliation: First Department of Internal Medicine, Nagoya City University Medical School, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kanamori
authors.forename: M
authors.initials: M
authors.lastname: Itoh
authors.forename: Y
authors.initials: Y
authors.lastname: Yokoyama
authors.forename: K
authors.initials: K
authors.lastname: Tsuchida
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003111:Colonic Polyps / Q000473:pathology / Q000601:surgery*; D003113:Colonoscopy; D019723:Endoscopes; D004724:Endoscopy / Q000379:methods*; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D015552:Injections, Intralesional; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000453:epidemiology; D011127:Polyps / Q000473:pathology / Q000601:surgery*; D011183:Postoperative Complications / Q000453:epidemiology; D012004:Rectal Neoplasms / Q000473:pathology / Q000601:surgery*; D012965:Sodium Chloride / Q000008:administration & dosage
chemical_list: D012965:Sodium Chloride