CD79A and celiac disease: Five patients (3.3%) were EMA-reactive and all of them exhibited subtotal villous atrophy in jejunal biopsies, thus allowing the diagnosis of celiac disease.41 Berti et al. reported that the prevalence of celiac disease (EMA IgA reactive and villous atrophy in small-bowel biopsies) was 3.4% among 172 individuals with autoimmune thyroid disease.42 Mainardi et al. demonstrated that the prevalence of celiac disease (IgG/IgA AGA, IgA TTG and IgA EMA antibodies and villous atrophy in duodenal biopsies) was 2% among 100 patients with autoimmune thyroiditis.