title: Long-term survivors with pN2 non-small cell lung cancer after a complete resection with a systematic mediastinal node dissection.
abstract: OBJECTIVE
  A substantial number of surgical patients with pN2 disease have survived longer than 5 years without any evidence of recurrence, although the surgical indications for those patients remain controversial. The present study was performed in order to clarify the clinical characteristics of the long-term survivors with pN2 disease.
  
  
  METHODS
  We retrospectively reviewed the cases of 111 patients with pN2 disease who had undergone a complete resection with a systematic mediastinal lymph node dissection from 1974 through 1991.
  
  
  RESULTS
  Of the 111 patients with pN2 disease, 20 survived longer than 5 years after a surgical resection. When both the pre- and post-operative conditions were compared between the long-term survivors and the others, the long-term survivors were characterized by significantly higher proportions of cN0 disease (P = 0.031), pT1 disease (P = 0.004), skip metastasis without hilar node metastasis (P = 0.028), and metastasis of a single mediastinal station (0.044). Of those characteristics, only the likelihood of having cN0 disease could be pre-operatively determined. The survival rate of such a population with cN0-pN2 disease was 34.5% at 5 years and 29.6% at 10 years after a complete resection, respectively.
  
  
  CONCLUSIONS
  Pathologic N2 patients with some favorable prognostic factors can survive long-term after a complete resection combined with a systematic mediastinal lymph node dissection. At present, due to the lack of any effective adjuvant therapy, a systematic mediastinal node dissection should be routinely performed even in patients with cN0 disease.
authors.affiliation: Department of Chest Surgery, National Kyushu Cancer Center, Fukuoka, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Yano
authors.forename: Y
authors.initials: Y
authors.lastname: Fukuyama
authors.forename: H
authors.initials: H
authors.lastname: Yokoyama
authors.forename: S
authors.initials: S
authors.lastname: Kuninaka
authors.forename: Y
authors.initials: Y
authors.lastname: Terazaki
authors.forename: T
authors.initials: T
authors.lastname: Uehara
authors.forename: H
authors.initials: H
authors.lastname: Asoh
authors.forename: Y
authors.initials: Y
authors.lastname: Ichinose
mesh_terms: D002289:Carcinoma, Non-Small-Cell Lung / Q000401:mortality* / Q000473:pathology / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008175:Lung Neoplasms / Q000401:mortality* / Q000473:pathology / Q000601:surgery; D008197:Lymph Node Excision; D008297:Male; D008482:Mediastinum; D009367:Neoplasm Staging; D011013:Pneumonectomy; D012189:Retrospective Studies; D016019:Survival Analysis; D015996:Survival Rate; D013997:Time Factors