title: Thrombocytosis has a negative prognostic value in lung cancer.
abstract: BACKGROUND
  Solid tumours have worse prognosis when associated with thrombocytosis. Our study assessed the prognostic value of thrombocytosis, and its relation with smoking habits in lung cancer.
  
  
  METHODS
  A total of 398 patients were operated on then divided into two groups, those with normal platelet counts (n=312), and those with thrombocytosis (n=86); 348 out of 398 patients had data for smoking habits (99 non-smokers, 249 smokers).
  
  
  RESULTS
  The frequency of thrombocytosis was 18.6%, 19.3%, 27.5 and 28.6% in patients with tumor stages I to IV, respectively. Thrombocytosis appeared most frequently in patients with squamous cell lung cancer, and among smokers. The overall 5-year survival was worse in patients with thrombocytosis (p<0.001). By uni- and multivariate analyses, platelet count, and T and N status were found to be independent prognostic factors.
  
  
  CONCLUSIONS
  Our study indicates that the presence of perioperative thrombocytosis in patients undergoing surgery should be considered as an independent prognostic factor of poor survival, and should be taken into account in regard to therapy.
authors.affiliation: Department of Oncotherapy, University of Szeged, Szeged, Hungary. dr.manna@freemail.hu
authors.forename: Anikó
authors.initials: A
authors.lastname: Maráz
authors.forename: József
authors.initials: J
authors.lastname: Furák
authors.forename: Zoltán
authors.initials: Z
authors.lastname: Varga
authors.forename: Zsuzsanna
authors.initials: Z
authors.lastname: Kahán
authors.forename: László
authors.initials: L
authors.lastname: Tiszlavicz
authors.forename: Katalin
authors.initials: K
authors.lastname: Hideghéty
mesh_terms: D000230:Adenocarcinoma / Q000150:complications* / Q000401:mortality / Q000601:surgery; D000328:Adult; D000368:Aged; D002289:Carcinoma, Non-Small-Cell Lung / Q000150:complications* / Q000401:mortality / Q000601:surgery; D002294:Carcinoma, Squamous Cell / Q000150:complications* / Q000401:mortality / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008175:Lung Neoplasms / Q000150:complications* / Q000401:mortality / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011379:Prognosis; D012189:Retrospective Studies; D012907:Smoking / Q000009:adverse effects; D015996:Survival Rate; D013922:Thrombocytosis / Q000209:etiology / Q000401:mortality*