What is the role of immunoglobulin A (IgA) antibodies in the etiology of celiac disease?

Updated: Oct 10, 2018
  • Author: Stephan U Goebel, MD; Chief Editor: BS Anand, MD  more...
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Answer

Immunoglobulin A (IgA) antibodies to smooth muscle endomysium and tissue transglutaminase (the most commonly used test) are used for serological diagnosis. However, 3-5% of all patients with celiac disease are IgA deficient. Therefore, determining total IgA prior to antibody testing is appropriate in patients with celiac disease.


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