title: Factors affecting complete resection of gastric tumors by the endoscopic mucosal resection procedure.
abstract: BACKGROUND
  In Japan, endoscopic mucosal resection (EMR) has been widely used as a treatment option for small early gastric cancer (EGC). The present study reviewed 178 cases for the 10-year period 1987-1997 in order to clarify the factors affecting the successful outcome of EMR.
  
  
  METHODS
  Logistic regression analysis was used to examine whether complete resection of EGC correlated with the patient's age, gender, the characteristics of the tumor (location, macroscopic form, and size), the duration of the procedure and the experience of the doctor.
  
  
  RESULTS
  The location of the tumor and the duration of the procedure correlated with the completeness of the resection (P < 0.01 and P < 0.05, respectively). Endoscopic mucosal resection was more difficult to perform for tumors in the gastric body than in the antrum or incisura region, and the longer the procedure the less complete the resection.
  
  
  CONCLUSIONS
  The outcome of EMR is affected significantly by the location of the EGC.
authors.affiliation: Institute of Community Medicine, University of Tsukuba, Ibaraki, Japan. fwkw0980@mb.infoweb.ne.jp
authors.forename: Takanori
authors.initials: T
authors.lastname: Ohyama
authors.forename: Yasuki
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: Katsumi
authors.initials: K
authors.lastname: Mori
authors.forename: Katsumi
authors.initials: K
authors.lastname: Kano
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Sakurai
authors.forename: Yuzuru
authors.initials: Y
authors.lastname: Sato
mesh_terms: D000368:Aged; D002983:Clinical Competence / Q000706:statistics & numerical data; D016099:Endoscopy, Gastrointestinal / Q000706:statistics & numerical data*; D005260:Female; D005753:Gastric Mucosa / Q000601:surgery*; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care / Q000706:statistics & numerical data*; D012044:Regression Analysis; D012189:Retrospective Studies; D012307:Risk Factors; D012720:Severity of Illness Index; D013274:Stomach Neoplasms / Q000601:surgery*; D013997:Time Factors