TGM2 and celiac disease: Coeliac disease-related laboratory abnormalities were identified in an additional 9 cases, with positive tissue transglutaminase IgA (tTG) or endomysial antibody (EMA) results, meaning that, in total, at least 33 (14.5%) of the 227 patients with isolated intraepithelial lymphocytosis actually had coeliac disease.