IL6 and Behcet disease: Of the cytokines tested, when compared with HCs, the plasma level of IL-6 was significantly elevated in both patients with BD (10.47 ± 19.79 vs. 0.44 ± 0.68, P = 0.007, Fig. 4) and patients with MD (8.94 ± 19.93 vs. 0.44 ± 0.68, P = 0.032, Fig. 4).