Thrombocytosis in women with vulvar carcinoma.

Thrombocytosis (platelet count >400 x 10(9)/L) is frequently found in association with malignant disease. Although the pathogenesis of thrombocytosis in malignancy is currently unclear, it appears to be a poor prognostic factor in patients with lung, colon, breast, and cervical carcinoma. The current study was initiated to assess the incidence of thrombocytosis in vulvar carcinoma and to evaluate its prognostic significance for patients with vulvar carcinoma. The pretreatment platelet counts of 201 women treated for vulvar cancer were reviewed and correlated to the patient's age, stage of disease, node status, histologic type, and outcome. Differences between categories were analyzed by means of the ANOVA test, and survival was compared using the log-rank test on the Kaplan-Meier life table. Thrombocytosis was presented in 14.92% of patients with vulvar malignancies and in 15.46% of patients with squamous cell carcinoma of the vulva. No correlation was found between thrombocytosis and tumor size, incidence of lymph node metastases, or stage of the disease. The 5-year survival rate for patients with thrombocytosis was 89.29%, which was not significantly different from the 76.47% 5-year survival of patients with normal platelet counts (P = 0.586). When adjusted for age, histological differentiation, number of tumors, staging, incidence of nodal metastases, platelet count, hemoglobin, and white blood count, only the staging, number of tumors, and histological differentiation were associated with an unfavorable prognosis (P = 0.0001, P = 0.003, P = 0.03, respectively). Thrombocytosis was not found to be a prognostic factor in patients with carcinoma of the vulva in this series of 201 patients.