Abstract:Objective To investigate the relationship between serum platelet factor 4 (PF4) and bladder cancer, the serum levels of hypoxia-inducible factor-1α (HIF-1α) and vascular endothelial growth factor (VEGF). Methods Selected 130 patients with bladder cancer were enrolled as bladder cancer group (group B) and 130 patients with healthy physical examination were enrolled as control group (group C) from January 2014 to December 2015 in the Department of Urology of Ningbo Medical Center Lihuili Eastern Hospital. The serum PF4 and neovascularization index (HIF-1α, VEGF) levels were determined. Results The serum levels of PF4, HIF-1α and VEGF in group B were higher than those in group C (P < 0.05). The serum PF4 levels of pathological grade T2- T4 patients were higher than Ta-T1 (P < 0.05). Univariate results showed that tumor size, tumor stage, lymph node metastasis and serum PF4, HIF-1α, VEGF levels were associated with the prognosis of bladder cancer (P < 0.05). Multivariate analysis showed that tumor stage, lymph node metastasis and serum PF4, HIF-1α and VEGF levels were independent risk factors for bladder cancer prognosis (P < 0.05). Serum PF4 was positively correlated with serum HIF-1α and VEGF levels in patients with bladder cancer (r = 0.591and 0.624, P < 0.05). Conclusion Serum PF4 levels are elevated in patients with bladder cancer, and serum PF4 levels are closely related to bladder cancer stage, prognosis and neovascularization.