title: [Value of mediastinoscopy in preoperative staging of non-small cell lung cancer-based on survival analysis].
abstract: OBJECTIVE
  To evaluate the value of mediastinoscopy in preoperative staging of non-small cell lung cancer (NSCLC) based on survival analysis.
  
  
  METHODS
  152 cases of potentially operable NSCLC were enrolled in this study. All cases underwent CT scan and mediastinoscopy for assessment of the mediastinal lymph node status before initial treatment. The definitive treatment was decided on the basis of mediastinoscopy and the survival rate was analyzed with a median follow-up of 30.5 months. Survival analysis was conducted by comparing the lymph node status which was determined by final pathology (groups pN0, pN1, pN2, pN3), CT scan (group cN0-1, cN2-3) and mediastinoscopy (group mN0-1, mN2, mN3).
  
  
  RESULTS
  The 5-year survival rates in group pN0, pN1, pN2 and pN3 were 61.7%, 75.0%, 32.4% and 16.1%, respectively. Both groups pN0 and pN1 had significantly higher survival rates than those in groups pN2 and pN3 (P < 0.05). There were not significant differences between survival rates in groups cN0-1 and cN2-3 (P = 0.670), while the survival rate in group mN0-1 was significantly higher than that in groups mN2 and mN3 (P < 0.05).
  
  
  CONCLUSIONS
  Mediastinoscopy is of great value in preoperative staging of NSCLC. Not only does it detect lymph node metastasis more precisely but also better predict the prognosis than CT scan.
authors.affiliation: Department of Thoracic Surgery, Sun Yat-sen University Cancer Center, Guangzhou 510060, China.
authors.forename: Xuan
authors.initials: X
authors.lastname: Xie
authors.forename: Xin
authors.initials: X
authors.lastname: Wang
authors.forename: Lie
authors.initials: L
authors.lastname: Zheng
authors.forename: Shi-yi
authors.initials: SY
authors.lastname: Zhang
authors.forename: Xiao-dong
authors.initials: XD
authors.lastname: Su
authors.forename: Hui
authors.initials: H
authors.lastname: Yu
authors.forename: Yong
authors.initials: Y
authors.lastname: Li
authors.forename: Jia-liang
authors.initials: JL
authors.lastname: Zhou
authors.forename: Li
authors.initials: L
authors.lastname: Ling
authors.forename: Tie-hua
authors.initials: TH
authors.lastname: Rong
mesh_terms: D000328:Adult; D000368:Aged; D002289:Carcinoma, Non-Small-Cell Lung / Q000473:pathology* / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology* / Q000601:surgery; D008197:Lymph Node Excision; D008198:Lymph Nodes / Q000473:pathology*; D008207:Lymphatic Metastasis; D008297:Male; D008481:Mediastinoscopy; D008875:Middle Aged; D009367:Neoplasm Staging / Q000379:methods*; D011013:Pneumonectomy; D057234:Preoperative Period; D015996:Survival Rate; D055815:Young Adult