Patients with cancer have a high risk of deep vein thrombosis which often develops in the veins of the lower limbs. The initial evaluation of clinically suspected deep vein thrombosis includes the estimation of the clinical probability by calculating risk scores such as the Wells score and the measurement of the D-dimer. However, the usefulness and accuracy of the clinical scores and d-dimer test are lower in patients with cancer who often undergo unnecessary (serial) ultrasonography. The aim of the current study is to analyze variables that predict the presence of thrombosis and may improve the accuracy of the Wells score. In addition, various cut-off of the d-dimer will be evaluated with the goal of improving the sensibility and specificity of the test.
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Proportion of false negative results of the combination of the modified Wells score and D-dimer results
Timeframe: 3 months