Negative, positive and then negative blood test

[Shellly]

Hello. I had a negative blood test for celiac, then a positive, then a negative. Dr still want to do a endoscopy to rule it out since I have iron deficiency. The problem is my out of pocket is really high. I’m wondering if anyone’s had any experience with positive and negative blood test. And what was the out come. My results are below. 

Tissue Transglutaminase- 17.9

-range less than 14.9

deamidated glaidin peptide -28

-range less than14.9

Negative result few months later

Tissue Transglutaminase- 10.6

-range less than 14.9

deamidated glaidin peptide -14.7  

-range less than14.9

 

 

[RMJ]

Did you change your diet in between tests?

[Shellly]

No, if anything I added gluten to my diet

[Scott Adams]

So it only takes one positive blood test to indicate that you have celiac disease, and you have shown us two positive tests here. 

This article might be helpful. It breaks down each type of test, and what a positive results means in terms of the probability that you might have celiac disease. One test that always needs to be done is the IgA Levels/Deficiency Test (often called "Total IGA") because some people are naturally IGA deficient, and if this is the case, then certain blood tests for celiac disease might be false-negative, and other types of tests need to be done to make an accurate diagnosis. The article includes the "Mayo Clinic Protocol," which is the best overall protocol for results to be ~98% accurate.