IL17A and Cowden disease: Small intestinal biopsies of children on a gluten-containing diet with active disease and later confirmed to have CD (Untreated CD), children with CD on a gluten-free diet and with inactive disease (Treated CD), and pediatric, clinical controls with no known food intolerance (Controls) were analyzed for mRNA levels of the cytokines IL-17A, IFN-γ, IL-10, and TGF-β1, and the Treg marker Foxp3.