Diagnostic and prognostic impact of preoperative thrombocytosis in muscle invasive bladder cancer: Any role in clinical practice?

Background: Since earlier research suggested a link between preoperative thrombocytosis and poor oncological outcomes in several cancers, the significance of platelet count abnormalities in bladder carcinoma (BC) demands for further investigation.

Objective: To assess the prognostic value of preoperative thrombocytosis (PTC) on survival in patients with bladder carcinoma treated by radical cystectomy (RC).

Patients And Methods: Analytical cohort comprised a single-center series of 299 patients who underwent RC for bladder carcinoma was evaluated. A platelet count beyond the threshold of 400 × 10 /L was considered thrombocytosis. Along with the Kaplan-Meier survival probability, cox proportional hazard regression models were used.

Results: Twenty-eight (9.4%) patients had preoperative thrombocytosis. PTC was associated with gender, tumor stage, tumor grade, lymphovascular invasion, hydronephrosis, anemia (p < 0.001), and hypoalbuminemia (p < 0.001). Preoperative thrombocytosis was strongly linked to worse overall survival (OS) (p = 0.002), and cancer specific survival (CSS) (p = 0.004), according to the Kaplan-Meier method. Throughout the follow-up, a total of 198 (66.2%) patients died, including 170 (56.9%) from BC. For this study population 5-year CSS was 45.8%. Preoperative thrombocytosis was not independently associated with OS (HR 1.168; 95% CI 0.740-1.844; p = 0.504) or CSS (HR 1.060; 95% CI 0.649-1.730; p = 0.816) in multivariate Cox regression analysis. Only tumor stage (HR 2.558; 95% CI 1.675-3.908; p < 0.001), hydronephrosis (HR 1.614; 95% CI 1.173-2.221; p = 0.003), lymph node metastasis (HR 1.555; 95% CI 1.076-2-2.248; p = 0.019), anemia (HR 1.454; 95% CI 1.034-2.046; p = 0.032) and ASA grade (HR 1.375; 95% CI 1.006-1.879; p = 0.046) were independently associated with CSS.

Conclusions: In a single-center study of consecutive patients who underwent radical cystectomy for bladder cancer, preoperative thrombocytosis was unable to predict outcomes.