title: Indications for paraaortic lymph node dissection in gastric cancer patients with paraaortic lymph node involvement.
abstract: OBJECTIVE
  The surgical results for stage IVb gastric cancer remain very poor. The purpose of the current study is to reveal indications for paraaortic lymph node dissection in stage IVb gastric cancer patients with paraaortic lymph node involvement by analyzing prognostic factors for 3-year survival of stage IVb gastric cancer patients followed by curative B resection.
  
  
  METHODS
  The 3-year survival in clinicopathologic variables were compared by univariate analysis. Using Cox proportional hazards regression model, independent prognostic factors were identified from 11 variables.
  
  
  RESULTS
  Overall 5-year survival in stage IVb was 26.5%; mean survival was 19 months. Using univariate analysis, p53 expression significantly influenced 3-year survival. Using Cox proportional hazards regression model, the number of total positive lymph nodes, the number of positive paraaortic lymph nodes, and p53 expression were independent prognostic factors.
  
  
  CONCLUSIONS
  In stage IVb, paraaortic lymph node dissection should be indicated in patients with < or = 10 total positive lymph nodes, and < or = 3 positive paraaortic lymph nodes or p53 expression < or = 50%. This indication can be applied according to the preoperative imaging, the staining of p53 by endoscopic biopsy specimens and the intraoperative microscopic evaluation of dissected lymph nodes.
authors.affiliation: Second Department of Surgery, Yokohama City University, Faculty of Medicine, Japan. s0714@med.yokohama-cu.ac.jp
authors.forename: C
authors.initials: C
authors.lastname: Kunisaki
authors.forename: H
authors.initials: H
authors.lastname: Shimada
authors.forename: H
authors.initials: H
authors.lastname: Yamaoka
authors.forename: M
authors.initials: M
authors.lastname: Takahashi
authors.forename: K
authors.initials: K
authors.lastname: Ookubo
authors.forename: H
authors.initials: H
authors.lastname: Akiyama
authors.forename: M
authors.initials: M
authors.lastname: Nomura
authors.forename: Y
authors.initials: Y
authors.lastname: Moriwaki
mesh_terms: D000328:Adult; D000368:Aged; D001011:Aorta; D005260:Female; D005743:Gastrectomy / Q000379:methods*; D006801:Humans; D008197:Lymph Node Excision / Q000379:methods*; D008198:Lymph Nodes / Q000473:pathology; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D016016:Proportional Hazards Models; D013274:Stomach Neoplasms / Q000401:mortality / Q000473:pathology / Q000601:surgery*; D015996:Survival Rate