title: Significance of thrombocytosis for determining prognosis in patients with localized renal cell carcinoma.
abstract: OBJECTIVE
  To evaluate the significance of thrombocytosis for determining survival in patients with localized renal cell carcinoma (RCC) who underwent radical nephrectomy with curative intent.
  
  
  METHODS
  The study population comprised 151 patients who underwent radical nephrectomy with a diagnosis of localized RCC. The inclusion criteria were at least one preoperative platelet count and a tissue diagnosis of RCC. Thrombocytosis was defined as a platelet count greater than 400,000/mm3. The charts of these patients were retrospectively reviewed and the relationship between the preoperative platelet counts and survival was evaluated according to the histologic variants.
  
  
  RESULTS
  The mean follow-up was 37.1 +/- 24.1 months (median 34, range 3 to 91). Of these 151 patients, 21 had a preoperative platelet count greater than 400,000/mm3. The thrombocytosis rate was significantly greater in those with advanced T stage (P = 0.045). Lymph node positivity also correlated with thrombocytosis (P = 0.028). However, no statistically significant correlation was found between grade and histologic subtypes and thrombocytosis (P = 0.053 and P = 0.354, respectively). Ten (47.6%) of 21 patients with thrombocytosis and 21 (16.2%) of the remaining 130 patients died of disease progression (P = 0.002). The Kaplan-Meier cause-specific survival curves showed that patients who had thrombocytosis had a mean survival of 45.2 months compared with 76.6 months in patients without thrombocytosis (P = 0.0002).
  
  
  CONCLUSIONS
  Preoperative thrombocytosis is a significant predictor for determining prognosis in patients with localized RCC. Thrombocytosis was found more frequently in patients with advanced stage RCC, and patients with preoperative thrombocytosis had a worse survival compared with those with normal platelet counts.
authors.affiliation: Department of Urology, Ankara University School of Medicine, Ankara, Turkey.
authors.forename: Cağatay
authors.initials: C
authors.lastname: Göğüş
authors.forename: Sümer
authors.initials: S
authors.lastname: Baltaci
authors.forename: Ercan
authors.initials: E
authors.lastname: Filiz
authors.forename: Atilla
authors.initials: A
authors.lastname: Elhan
authors.forename: Yaşar
authors.initials: Y
authors.lastname: Bedük
mesh_terms: D000328:Adult; D000368:Aged; D002292:Carcinoma, Renal Cell / Q000097:blood* / Q000473:pathology / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007680:Kidney Neoplasms / Q000097:blood* / Q000473:pathology / Q000601:surgery; D015993:Life Tables; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009392:Nephrectomy; D010976:Platelet Count; D011183:Postoperative Complications / Q000209:etiology*; D011379:Prognosis; D012189:Retrospective Studies; D016019:Survival Analysis; D013922:Thrombocytosis / Q000209:etiology*