TPO and celiac disease: However, patients with autoimmune diabetes often also show the presence of antibodies associated with other coexisting autoimmune diseases including hypothyroidism (20%), coeliac disease (11%), Addison’s disease (2%), and autoimmune gastric mucositis (1%): anti-TPO, anti-TG, anti-DGP, anti-TG, and anti-EMA [92,93].