The serum anti-transglutaminase antibodies are the immunological markers for coeliac disease diagnosis. These autoantibodies are synthesized by B-lymphocytes at the intestinal level and their presence in the form of intestinal deposits is a constant feature in the different clinical entities in which coeliac disease is classified: classical, silent, and potential. These intestinal autoantibodies are the first gluten dependent inflammatory markers
and they appear before both the intestinal damage and the serum anti-transglutaminase antibodies. The anti-transglutaminase deposits should be looked for to confirm or exclude the diagnosis of coeliac disease when the clinical and immunological features are incomplete or in asymptomatic at risk patients.
