title: Polyp and endoscopist-related factors influencing complication rates in difficult colonic polypectomies: results of a multicenter observational study.
abstract: BACKGROUND
  Current polypectomy practices are highly variable. Endoscopists report increased size, nonpolypoid lesion type and unfavorable position as characteristic of difficult polypectomies. We studied reported difficult colonic polypectomies to determine polyp-related and operator-dependent factors influencing complication rates.
  
  
  METHODS
  We conducted an international multicenter observational prospective study of difficult colonic polypectomies. Endoscopists reported difficult cases of colonic polypectomies, techniques and complication rates. Per-polyp and per-endoscopist analyses were performed.
  
  
  RESULTS
  Ninety procedures were reported at 4 participating centers by 19 endoscopists. 43% of the lesions were pedunculated, 39% were sessile and 18% were flat. Lesion size ranged between 5-60 mm. Bleeding occurred in 18 out of 90 procedures (17 immediate, 1 delayed); no perforations were reported. Bleeding rate was independent of patient age or sex, polyp type, size and histology or resection method. Procedures were deemed difficult due to polyp size (37/90), unfavorable position (23/90), bleeding risk (12/90), lesion type (12/90) or other reasons (6/90) with no statistically significant difference between expert and beginner endoscopists (p = 0.14).
  
  
  CONCLUSIONS
  Difficult colonic polypectomies are unpredictable with a complication rate independent of polyp type or size. There was no difference between experts and beginners with regard to technical aspects of resection or complication rates.
authors.forename: T
authors.initials: T
authors.lastname: Voiosu
authors.forename: I
authors.initials: I
authors.lastname: Raţiu
authors.forename: C M
authors.initials: CM
authors.lastname: Hervoso
authors.forename: M
authors.initials: M
authors.lastname: Furnari
authors.forename: A
authors.initials: A
authors.lastname: Voiosu
authors.forename: A
authors.initials: A
authors.lastname: Goldiş
authors.forename: B
authors.initials: B
authors.lastname: Mateescu
authors.forename: M
authors.initials: M
authors.lastname: Tacconi
authors.forename: P
authors.initials: P
authors.lastname: Dulbecco
authors.forename: A
authors.initials: A
authors.lastname: Haidar
authors.forename: M R
authors.initials: MR
authors.lastname: Voiosu
authors.forename: I
authors.initials: I
authors.lastname: Sporea
mesh_terms: D000368:Aged; D003111:Colonic Polyps / Q000473:pathology* / Q000601:surgery*; D003113:Colonoscopy / Q000009:adverse effects / Q000379:methods*; D005260:Female; D006801:Humans; D007558:Italy; D008297:Male; D008875:Middle Aged; D019106:Postoperative Hemorrhage / Q000209:etiology; D011446:Prospective Studies; D012383:Romania; D012720:Severity of Illness Index; D016896:Treatment Outcome