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Best Lab To Get Full Panel Bloodwork For Accurate Celiac Results

cillivilli
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cillivilli Newbie
cillivilli
Posted

I read that different labs use different testing techniques which can effect TTg-Iga results. Which Lab should I have my TTg-Iga blood test and which one does a full panel test?

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trents Grand Master
trents
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The antibody blood tests used to diagnose celiac disease are standardized in the sense of what is being measured. How the tests are conducted and the scales used (as well as the units used) to express the results can vary from lab to lab. This does not affect the accuracy of the testing. So, there shouldn't be an issue with choosing one lab over another to ensure testing accuracy. What you don't want to do is to compare test results from two different time periods done by two different labs. If you are wanting to compare blood antibody test results over time, then the tests would need to have been done by the same lab in order for the comparison to be meaningful. And by the way, the TTG-IGA is not the only celiac antibody test that can be run nor is the only one that should be run. At least a "total IGA" test should be ordered whenever the tTG-IGA is ordered to make sure the tTG-IGA result is not invalidated by IGA deficiency. Here is an article outlining the various tests that can be ordered to diagnose celiac disease: 

 

 

 

Scott Adams Grand Master
Scott Adams
Posted

I agree with @trents, but for genetic tests it does seem like there are some variations between different labs and the celiac gene markers that are included, but for your celiac disease blood test just make sure that a full celiac disease panel is done that includes total IgA.

cillivilli Newbie
cillivilli
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Thank you @trents and @Scott Adams your input was very helpful! 

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    • tiffanygosci
      Celiac support is hard to find

      By tiffanygosci · Posted

      EDIT: I did find a monthly Zoom meeting for Celiacs through the Celiac Disease Foundation, so I'll be able to talk with some other people on January 15. And I also found a Celiac Living podcast on Spotify made by a celiac. I feel a little bit better now and I am still hoping I will find some more personal connections in my area.
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      Help understand results

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      Welcome to the celiac.com community, @mamaof7! It means for the one celiac disease antibody test that was ordered, she tested negative. However, other tests should have been ordered, especially for someone so young who would have an immature immune system where there would be a high probability of being IGA deficient.  The one test that was ordered was an IGA-based antibody test. It is not the only IGA antibody test for celiac disease that can be run. The most common one ordered by physicians is the TTG-IGA. Whenever IGA antibody tests are ordered, a "total IGA" test should be included to check for IGA deficiency. In the case of IGA deficiency, all other IGA tests results will be inaccurate. There is another category of celiac disease antibody tests that can be used in the case of IGA deficiency. They are known as IGG tests. I will attach an article that gives an overview of celiac disease antibody tests. All this to say, I would not trust the results of the testing you have had done and I would not rule out your daughter having celiac disease. I would seek further testing at some point but it would require your daughter to have been eating normal amounts of gluten for weeks/months in order for the testing to be valid. It is also possible she does not have celiac disease (aka, "gluten intolerance") but that she has NCGS (Non Celiac Gluten Sensitivity, or just "gluten sensitivity" for short) which is more common. The difference is that celiac disease is an autoimmune disorder that damages the lining of the small bowel whereas NCGS does not autoimmune in nature and does not damage the lining of the small bowel, though the two conditions share many of the same symptoms. We have testing to diagnose celiac disease but there are no tests for NCGS. To arrive at a diagnosis of NCGS, celiac disease must first be ruled out. A gluten free diet is the solution to both maladies.   
    • mamaof7
      Help understand results

      By mamaof7 · Posted

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    • Dizzyma
      Newly diagnosed mam to coeliac 11 year old

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