Correlation of platelet count with second-look laparotomy results and disease progression in patients with advanced epithelial ovarian cancer.

Objective: To evaluate the significance of preoperative platelet counts in advanced epithelial ovarian cancer with respect to second-look laparotomy results and disease progression.
Methods: We prospectively evaluated 37 consecutive patients with advanced epithelial ovarian cancer who underwent primary surgical treatment. In addition to platelet counts, all patients were evaluated with respect to age, gravida, parity, and stage and grade of tumor. Thirty-six patients had stage III, and 1 patient had stage IV disease. Optimal debulking (diameter of residual tumor, less than 1 cm) was performed in all patients who subsequently received adjuvant chemotherapy (platin-paclitaxel). According to second-look laparotomy and follow-up results patients were divided into 2 groups. The first group had negative second-look laparotomy or no evidence of disease during follow-up (n = 20), and the second group had positive second-look laparotomy or progressive disease (n = 17). Sensitivity and specificity values were calculated for different cutoff values of platelet counts with receiver operating characteristic curve analysis.
Results: Age, gravida, and parity were not significantly different compared with controls (P >.05). Mean platelet counts were 371 x 109/L and 446 x 109/L in the first and second groups, respectively (P =.03). Different cutoff values of platelet counts for the diagnosis of thrombocytosis were evaluated. A cutoff value of 380 x 109/L had sensitivity 77% and specificity 60% for recurrence, whereas a cutoff value of 400 x 109/L had sensitivity 59% and specificity 65%. Area under the curve (+/- standard error) was 0.72 +/- 0.08 (P =.026).
Conclusion: In patients with progressive disease and positive second-look laparotomy, preoperative platelet counts were significantly higher compared with patients with no evidence of disease on follow-up.