title: More effective endoscopic resection with a two-channel colonoscope for carcinoid tumors of the rectum.
abstract: OBJECTIVE
  Complete resection of small carcinoid tumors of the rectum is difficult with conventional polypectomy, because these tumors are most often located in the submucosal layer of the rectal wall. To completely remove these tumors, we used a two-channel videocolonoscope with which both a grasping forceps and a polypectomy snare could be used simultaneously. We evaluated its clinical usefulness in comparison with one-channel colonoscopic polypectomy.
  
  
  METHODS
  At Osaka Medical Center for Cancer and Cardiovascular Diseases, seven carcinoid tumors in seven patients were removed with a one-channel videocolonoscope from 1985 to 1992. In 1993 and 1994, ten tumors in nine patients were removed with a two-channel colonoscope.
  
  
  RESULTS
  The rate of complete removal of carcinoid tumors with a two-channel videocolonoscope (9 of 10 tumors, 90 percent) was significantly higher (P < 0.05) than with a one-channel videocolonoscope (2 of 7 tumors, 29 percent). No complications occurred during or after endoscopic resection with a two-channel colonoscope.
  
  
  CONCLUSIONS
  Endoscopic resection with a two-channel colonoscope is a useful and safe method for resection of small carcinoid tumors of the rectum.
authors.affiliation: Department of Gastrointestinal Oncology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Iishi
authors.forename: M
authors.initials: M
authors.lastname: Tatsuta
authors.forename: H
authors.initials: H
authors.lastname: Yano
authors.forename: H
authors.initials: H
authors.lastname: Narahara
authors.forename: K
authors.initials: K
authors.lastname: Iseki
authors.forename: S
authors.initials: S
authors.lastname: Ishiguro
mesh_terms: D002276:Carcinoid Tumor / Q000601:surgery*; D003113:Colonoscopy; D004564:Electrocoagulation; D004724:Endoscopy / Q000379:methods*; D006801:Humans; D012004:Rectal Neoplasms / Q000601:surgery*; D016896:Treatment Outcome