PTX3 and psoriasis: The mean serum pentraxin 3 concentration in patients with psoriasis was 245 ± 34.2 pg/mL before treatment and 165 ± 18.1 pg/mL after, and it was significantly higher compared to the controls, who had a concentration of 136 ± 20.5 ng/mL (p < 0.01) (Figure 1a).