title: A multicenter retrospective study of endoscopic resection for early gastric cancer.
abstract: BACKGROUND
  The reported outcomes of endoscopic resection (ER) for early gastric cancer (EGC) remain limited to several single-institution studies.
  
  
  METHODS
  A multicenter retrospective study was conducted at 11 Japanese institutions concerning their results for ER, including conventional endoscopic mucosal resection (EMR) and endoscopic submucosal dissection (ESD).
  
  
  RESULTS
  A total of 714 EGCs (EMR, 411; ESD, 303) in 655 consecutive patients were treated from January to December 2001. Technically, 511 of the 714 (71.6%) lesions were resected in one piece. The rate of one-piece resection with ESD (92.7%; 281/303) was significantly higher compared with that for EMR (56.0%; 230/411). Histologically, curative resection was found in 474 (66.3%) lesions. The rate of curative resection with ESD (73.6%; 223/303) was significantly higher compared with that for EMR (61.1%; 251/411). Blood transfusion because of bleeding was required in only 1 patient (0.1%) with EMR of 714 lesions. Perforation was found in 16 (2.2%). The incidence of perforation with ESD (3.6%; 11/303) was significantly higher than that with EMR (1.2%; 5/411). All complications were managed endoscopically, and there was no procedure-related mortality. The median follow-up period was 3.2 years (range, 0.5-5.0 years). In total, the 3-year cumulative residual-free/recurrence-free rate and the 3-year overall survival rate were 94.4% and 99.2%, respectively. The 3-year cumulative residual-free/recurrence-free rate in the ESD group (97.6%) was significantly higher than that in the EMR group (92.5%).
  
  
  CONCLUSIONS
  ER leads to an excellent 3-year survival in clinical practice and could be a possible standard treatment for EGC. ESD has the advantage of achieving one-piece resection and reducing local residual or recurrent tumor.
authors.affiliation: Endoscopy Division, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan.
authors.forename: Ichiro
authors.initials: I
authors.lastname: Oda
authors.forename: Daizo
authors.initials: D
authors.lastname: Saito
authors.forename: Masahiro
authors.initials: M
authors.lastname: Tada
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Iishi
authors.forename: Satoshi
authors.initials: S
authors.lastname: Tanabe
authors.forename: Tsuneo
authors.initials: T
authors.lastname: Oyama
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Doi
authors.forename: Yoshihide
authors.initials: Y
authors.lastname: Otani
authors.forename: Junko
authors.initials: J
authors.lastname: Fujisaki
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Ajioka
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Hamada
authors.forename: Haruhiro
authors.initials: H
authors.lastname: Inoue
authors.forename: Takuji
authors.initials: T
authors.lastname: Gotoda
authors.forename: Shigeaki
authors.initials: S
authors.lastname: Yoshida
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D016099:Endoscopy, Gastrointestinal / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D005753:Gastric Mucosa / Q000473:pathology / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000473:pathology / Q000601:surgery*; D009367:Neoplasm Staging; D012189:Retrospective Studies; D013274:Stomach Neoplasms / Q000473:pathology / Q000601:surgery*; D013997:Time Factors; D016896:Treatment Outcome