Several serological tests are available for CD diagnosis that detect antibodies directed against a fragment of the gluten antigen, anti-deamidated gliadin peptide (DGP), or self-antigens, anti-endomysial (EMA) and anti-tissue transglutaminase (TTG) antibodies, of both IgA and IgG classes [1]. This evidence concerns the gene CD79A and Cowden disease.