title: Efficacy of endoscopic submucosal dissection for cancer of the operated stomach.
abstract: OBJECTIVE
  Cancer can develop in the operated stomach after partial gastrectomy and in the reconstructed gastric tube after surgery for esophageal cancer. It is considered that endoscopic therapy is more safe and suitable for the early gastric cancer developed in such stomach than operation. We investigated the efficacy of endoscopic submucosal dissection (ESD) for cancer of the operated stomach.
  
  
  METHODS
  Subjects were 669 gastric cancer patients who underwent ESD: 22 patients (23 lesions) had surgically altered gastric anatomy, whereas 647 patients (727 lesions) had normal gastric anatomy. In the altered gastric anatomy group, 13 patients, 6 patients, and 3 patients had previously undergone distal gastrectomy, gastric tube reconstruction, and proximal gastrectomy, respectively. Rates of complete en bloc resection and curative resection were compared between the two groups. Influence of an anastomotic site and/or a suture line on ESD outcomes was examined in the altered gastric anatomy group.
  
  
  RESULTS
  The rate of complete en bloc resection by ESD was 82.6% (19/23 lesions) in the altered gastric anatomy group and 92.3% (671/727 lesions) in the normal gastric anatomy group. The rate of curative resection and incident rates of complications were not significantly different between the groups. In the altered gastric anatomy group, the rate of complete en bloc resection was significantly lower when a lesion had spread across an anastomotic site and/or a suture line (P = 0.0372). Furthermore, duration of ESD was significantly longer (P = 0.0276), and resection efficiency was significantly lower (13 mm(2)/min, P = 0.0283), when treating lesions with an anastomotic site and/or a suture line than when treating isolated lesions.
  
  
  CONCLUSIONS
  Outcome of ESD for cancer of the operated stomach compares with that in normal stomach anatomy. Anastomotic site/suture line within a lesion influenced the ESD procedure.
authors.affiliation: Department of Gastroenterology and Hepatology, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-kogushi, Ube, Yamaguchi, Japan.
authors.forename: Junichi
authors.initials: J
authors.lastname: Nishimura
authors.forename: Jun
authors.initials: J
authors.lastname: Nishikawa
authors.forename: Kouichi
authors.initials: K
authors.lastname: Hamabe
authors.forename: Munetaka
authors.initials: M
authors.lastname: Nakamura
authors.forename: Atsushi
authors.initials: A
authors.lastname: Goto
authors.forename: Takeshi
authors.initials: T
authors.lastname: Okamoto
authors.forename: Osamu
authors.initials: O
authors.lastname: Miura
authors.forename: Isao
authors.initials: I
authors.lastname: Sakaida
mesh_terms: D000368:Aged; D016022:Case-Control Studies; D004210:Dissection; D005260:Female; D005500:Follow-Up Studies; D005743:Gastrectomy; D005753:Gastric Mucosa / Q000473:pathology / Q000601:surgery*; D005773:Gastroscopy / Q000379:methods*; D006801:Humans; D008297:Male; D013274:Stomach Neoplasms / Q000473:pathology / Q000601:surgery*; D016896:Treatment Outcome