[Activation of coagulation in patients with lung cancer]

The aim of this study is to evaluate the anomalies of coagulation (by assaying the factor VIII, fibrinogen, D-dimer and resistance to activated protein C) in patients with lung cancer.

101 patients newly diagnosed with lung cancer before treatment and 72 control blood donors were included in the study after informed consent. All coagulation tests were performed on Stago STA-Compact. Statistical analyses were performed using the SPSS software version 22.

The study of the coagulation showed that plasma levels of all coagulation parameters were significantly higher in patients compared to controls. Coagulation was not influenced by the age of patients. No significant difference was found between the histological types in terms of coagulation. Factor VIII level was significantly elevated in stage IV patients compared to stage I + II + III patients. At the cut-off value of 6.22 g/L, the elevation of fibrinogen had a significant statistical relationship with thromboembolic disease (p=0.014) giving an hazard ratio of 3.868, confidence interval [1.358-11.012]. In multivariate analysis the hazard ratio doubled to 6.398, confidence interval [1,970-20,778].

Lung cancer patients showed an increase in coagulation factors that resulted in a state of hypercoagulability that was independent of the histology of lung cancer. The elevation of fibrinogen was predictive of thromboembolic disease at the early diagnosis of lung cancer before any therapy.