title: The clinical significance of thrombocytosis in women presenting with a pelvic mass.
abstract: OBJECTIVE
  We attempted to determine the clinical usefulness of a preoperative platelet count for predicting malignancy in patients presenting with a pelvic mass. Additionally, in patients in whom a preoperative serum CA 125 level was also determined, the clinical usefulness was compared.
  
  
  METHODS
  A retrospective review of charts of 241 patients presenting with a pelvic mass was carried out. The patients were then divided by pathologic diagnosis into group 1, benign disease (n = 102), and group 2, invasive (n = 121) or borderline (n = 18) malignancies. Thrombocytosis (platelet count greater than 400,000/microliters) was present in 16% (n = 16) of patients in group 1 and in 56% (n = 78) of patients in group 2 (p less than 0.0001). Of the 241 patients, 130 also had preoperative serum CA 125 levels measured. Elevated values of serum CA 125 (greater than 35 U/ml) occurred in 14% (n = 8) of group 1 and in 81% (n = 60) of group 2 (p less than 0.0001). The chi 2 test was used to analyze results of data.
  
  
  RESULTS
  Statistically significant differences in preoperative platelet count and serum CA 125 values were found between group 1 and group 2 patients. The specificity and positive predictive value for thrombocytosis (84% and 83%) compared well with those for serum CA 125 (86% and 88%). The combined use of the tests resulted in specificity of 96% and positive predictive value of 95%.
  
  
  CONCLUSIONS
  Preoperative platelet count is a test that is rapidly available and easily obtained. The test results may be of value in planning the original management of women presenting with a pelvic mass.
authors.affiliation: Department of Obstetrics, State University of New York, Stony Brook 11794-8091.
authors.forename: E
authors.initials: E
authors.lastname: Chalas
authors.forename: M
authors.initials: M
authors.lastname: Welshinger
authors.forename: W
authors.initials: W
authors.lastname: Engellener
authors.forename: J
authors.initials: J
authors.lastname: Chumas
authors.forename: R
authors.initials: R
authors.lastname: Barbieri
authors.forename: W J
authors.initials: WJ
authors.lastname: Mann
mesh_terms: D000328:Adult; D015295:Antigens, Tumor-Associated, Carbohydrate / Q000032:analysis; D005260:Female; D006801:Humans; D008875:Middle Aged; D010386:Pelvic Neoplasms / Q000097:blood / Q000150:complications*; D010976:Platelet Count; D011237:Predictive Value of Tests; D012372:ROC Curve; D012680:Sensitivity and Specificity; D013922:Thrombocytosis / Q000097:blood / Q000209:etiology*
chemical_list: D015295:Antigens, Tumor-Associated, Carbohydrate