title: Invasion beyond interlobar pleura in non-small cell lung cancer.
abstract: OBJECTIVE
  To assess the outcome of lung cancer with invasion beyond interlobar pleura and to clarify whether it should be treated in the same way as invasion to the parietal pleura or to other visceral pleura.
  
  
  METHODS
  Retrospective analysis.
  
  
  METHODS
  Tokyo Medical College Hospital.
  
  
  METHODS
  Eighteen resected non-small cell lung cancers with invasion beyond interlobar pleura were studied. The outcomes of those patients, those with parietal pleural invasion, and those with other visceral pleural invasion were compared. Patients with rib invasion, mediastinal organ invasion, or distant metastasis were excluded.
  
  
  RESULTS
  The 5-year survival rate for patients with invasion beyond interlobar pleura was 34.2% and the median survival time was 56.5 months. The outcome was significantly better than that of patients with parietal pleural invasion. There was no significant difference between the outcome of invasion beyond interlobar pleura and that of other visceral pleural invasion. In patients without lymph node metastasis, similar results were obtained. There was no difference between the outcome of patients with invasion beyond interlobar pleura, who undergo lobectomy with a parietal resection of the invaded lobe, and that of patients with visceral pleural invasion, who undergo lobectomy.
  
  
  CONCLUSIONS
  The behavior of patients with invasion beyond interlobar pleura is different from that of patients with parietal pleural invasion and should be categorized as T2. The optimum operative method was lobectomy with only parietal resection of the invaded lobe to preserve the pulmonary function.
authors.affiliation: Department of Thoracic Surgery, Hachioji Medical Center of Tokyo Medical College, Hachioji-city, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Miura
authors.forename: O
authors.initials: O
authors.lastname: Taira
authors.forename: O
authors.initials: O
authors.lastname: Uchida
authors.forename: H
authors.initials: H
authors.lastname: Kato
mesh_terms: D000368:Aged; D002289:Carcinoma, Non-Small-Cell Lung / Q000401:mortality / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000401:mortality / Q000473:pathology* / Q000601:surgery; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D010994:Pleura / Q000473:pathology*; D011013:Pneumonectomy; D012189:Retrospective Studies; D015996:Survival Rate