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Importance Of Autoantibody Screening In Diagnosis Of Celiac Disease | 54637
ISSN: 2161-069X
Journal of Gastrointestinal & Digestive System
Open Access
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Background: Small bowel biopsy is considered as the gold standard for diagnosis of celiac disease (CD) and detection of
autoantibodies is usually the initial step in diagnosis of CD.
Objective: This study was performed to assess the performance of each celiac specific auto antibody against the gold standard.
Methods: This retrospective study included 267 patients with clinical suspicion of CD who underwent investigations for
diagnosis of CD between March 2011 and June 2014 at the King Khalid University Hospital, Riyadh. The panel of celiac specific
antibodies was tested which comprised of anti-gliadin IgG and IgA, anti-tissue Transglutaminase IgG (anti-tTGG) and IgA
(anti-tTGA), anti-endomysium and anti-reticulin antibodies. Anti-endomysium and antireticulin antibodies were tested by
immunofluorescence and the others were assessed by ELISA.
Results: Out of the all, only 61 patients including 35 females and 26 males (mean age 26�?±11 years) were subjected to small
bowel biopsy testing with 37 positive and 24 negative results. Among the six autoantibodies assessed, anti-tTGA had a
sensitivity of 97.3%, specificity of 83%, positive predictive value (PPV) of 90% and a negative predictive value (NPV) of 95%.
Anti-endomysium antibody had a sensitivity of 62.1%, specificity of 95.7%, PPV of 95.8% and NPV of 62.2%. None of the other
autoantibodies displayed any notable performance. Receiver operator curve analysis also confirmed the diagnostic accuracy of
anti-tTGA with 90.3% area under curve (AUC) followed by anti-endomysium antibody with 70% AUC.
Conclusion: In the presence of relevant history, anti-TGA as a single test can be used as an initial screening test for CD.