Fourteen patients with subsequent diagnosis of deep vein thrombosis, arterial thrombosis or pulmonary thromboembolism had significantly higher plasma levels of PTX3 than those without it (median [IQR]: 51.4 [24.6-94.4] versus 21 [13.4-55.2]; Mann-Whitney test P=0.049). Here, PTX3 is linked to Arterial thrombosis.