title: [Diagnosis and surgical treatment of double primary lung cancer].
abstract: OBJECTIVE
  To arrive at a rational diagnosis and effective surgical treatment of double primary lung cancer.
  
  
  METHODS
  Thirty-four patients with double primary lung cancers were operated in our department from 1977 to 1999.
  
  
  RESULTS
  Twenty-two lesions were metachronous and 12 synchronous. Among the patients with metachronous second primary lung cancer, 10 were treated by lobectomy, 11 by partial resection and one was explored only. The morbidity, mortality and 5-year survival rates were 13.6%, 4.6% and 25.0%, respectively. Among the synchronous double primary lung cancer patients, 2 were treated by lobectomy and 2 by pneumonectomy and the others by partial resection at least for one tumor. There was no morbidity or mortality, and the 5-year survival rate was 14.3%.
  
  
  CONCLUSIONS
  Because of the low detection rate of double primary lung cancer, preoperative diagnosis, differential diagnosis and postoperative follow up must be paid with due attention. Conservative operation and incomplete lymph node dissection, being the chief reasons of poor outcome, should be stressed.
authors.affiliation: Department of Thoracic Surgery, Cancer Institute (Hospital), Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100021, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.forename: L
authors.initials: L
authors.lastname: Wang
authors.forename: D
authors.initials: D
authors.lastname: Zhang
mesh_terms: D000230:Adenocarcinoma / Q000145:classification / Q000175:diagnosis / Q000401:mortality / Q000601:surgery*; D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000145:classification / Q000175:diagnosis / Q000401:mortality / Q000601:surgery*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000145:classification / Q000175:diagnosis / Q000401:mortality / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D009378:Neoplasms, Multiple Primary / Q000145:classification / Q000175:diagnosis / Q000401:mortality / Q000601:surgery*; D011183:Postoperative Complications; D012189:Retrospective Studies; D015996:Survival Rate