Blood Test/diagnosis Question in Celiac Disease Pre-Diagnosis, Testing & Symptoms Posted April 2, 2012 · Report to Admin Scientists are comparing them even as we type. It looks like the combo of DGP-IgG and TTG-IgA may be the best bet to help reduce false positives. http://www.ncbi.nlm.nih.gov/pubmed/20171961 http://www.ncbi.nlm.nih.gov/pubmed/20042872 Skylark, as usual, you are able to school me! I will have to find the full text of these online. Not trying to be thick-headed here, but since this points to a combo of DGP-IgG and TTG IgA, then what about the folks (like me) who are positive for DGP IgG but not TTG IgA? Isn't the chance of a false positive extremely slim? Are you aware of anything else besides celiac that could cause a high DGP IgG? (For example, my GI doctor said it could be related to a wheat allergy, which seems far-fetched, but what do I know...) Related to this...is it true that testing DGP IgG could detect celiac earlier than some of the other antibodies tests? So should I feel confident in my results and feel fortunate to have possibly caught this at an earlier stage?