['Androgen deprivation therapy (ADT) for prostate cancer (PCa) may increase peripheral insulin resistance, induce type 2 diabetes, change body composition, and alter lipoprotein profile. Some studies have reported an association between ADT and increased risk of cardiovascular events. It is known that serum level of fibrinogen (SF) is associated with coronary artery disease and increased cardiovascular risk (CVR). The aim of this study is to determine the increase in SF and C-reactive protein (CRP) of PCa patients on ADT.', 'Ninety-seven patients with locally advanced PCa (study group) were analyzed [mean age 73.4\xa0years\xa0±\xa06.3\xa0SD, mean prostate specific antigen (PSA) 15.4\xa0ng/ml\xa0±\xa07.5\xa0SD]. They were examined with blood chemistry including serum cholesterol (CHL), high density lipoproteins (HDL), low density lipoproteins (LDL), very low density lipoproteins, triacylglycerol (TAG), serum fibrinogen (FB), CRP and serum fasting glucose (SFG), serum testosterone, free testosterone at baseline, and after 12\xa0months of ADT.', 'Patients after 12\xa0months of ADT (study group) had significantly higher overall serum CHL (p\xa0<\xa00.001), higher LDL (p\xa0=\xa00.01), higher FB (p\xa0<\xa00.001), higher serum SFG (p\xa0=\xa00.03) in comparison with the control group. Increase in HDL (p\xa0=\xa00.245) and CRP (p\xa0=\xa00.1) was not significant. Two patients from the study group were diagnosed with new-onset diabetes.'] Do patients with prostate cancer treated by ADT have significantly higher fibrinogenemia than healthy control?