CD79A and celiac disease: CD can be characterized by the presence of serum IgA against transglutaminase type 2 (TG2A), IgA against endomysium (EMA), genetic carriership for HLA DQ2.2, DQ2.5 and/or DQ8, and a gluten induced enteropathy [11], which is graded according to the Marsh-Oberhuber criteria [12–14].