The levels of IL-17F, IL-23, and IL-27 were significantly and strongly correlated with the level of IgG to EV in patients with CD and coexisting T1D (r = 0.93; P = 0.001, r = 0.73; P = 0.04, and r = 0.95; P = 0.001, respectively). The gene discussed is IL17F; the disease is type 1 diabetes mellitus.