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Genotyping


Peta

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Took my 15 year old son to the doctor again today.

He is still very low in iron and is awaiting a biopsy (hopefully in the next few months).

He has had the HLA DQ2/DQ8 genotyping for Coeliac.

The results were:

HLA DQ2 Alleles

DQA1 *05 Positive

DQB1 *02 Positive

HLA DQ8 Alleles

DQa1 *0301 Positive

DQB1 *0302 Positive

The doctor seems to be pretty sure from these results that my son has celiac?

Doesn't this just mean he is predisposed to coeliac but doesn't necessary mean he has it?

I questioned that the serum test (antibodies) came back negative but he said that the genotyping for Coeliac gives a clinical positive to coeliac so we now just need the biopsy to prove it?

Can someone tell me if this gene test says anything more than he carries the gene?... it doesn't mean a positive clinical testfor celiac though does it?

I feel that you 'experts' can probably interpret the test results better than the doctor.

Thanks for any opinions.


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psawyer Proficient

A positive genetic test means that he is susceptible to celiac disease. It does not diagnose anything. Only about ten percent of those who carry the genes develop the disease. Low iron is a common symptom.

False negatives, especially in young children, are common on both the blood test and the biopsy.

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    • par18
      Thanks for the reply. 
    • Scott Adams
      What you’re describing is actually very common, and unfortunately the timing of the biopsy likely explains the confusion. Yes, it is absolutely possible for the small intestine to heal enough in three months on a strict gluten-free diet to produce a normal or near-normal biopsy, especially when damage was mild to begin with. In contrast, celiac antibodies can stay elevated for many months or even years after gluten removal, so persistently high antibody levels alongside the celiac genes and clear nutrient deficiencies strongly point to celiac disease, even if you don’t feel symptoms. Many people with celiac are asymptomatic but still develop iron and vitamin deficiencies and silent intestinal damage. The lack of immediate symptoms makes it harder emotionally, but it doesn’t mean gluten isn’t harming you. Most specialists would consider this a case of celiac disease with a false-negative biopsy due to early healing rather than “something else,” and staying consistently gluten-free is what protects you long-term—even when your body doesn’t protest right away.
    • Scott Adams
      Yes, I meant if you had celiac disease but went gluten-free before screening, your results would end up false-negative. As @trents mentioned, this can also happen when a total IGA test isn't done.
    • Seaperky
      I found at Disney springs and Disney they have specialist that when told about dietary restrictions they come and talk to you ,explain cross contamination measures tsken and work with you on choices. Its the one place I dont worry once I've explained I have celiac disease.  Thier gluten free options are awesome.
    • Churley
      Have you tried Pure Encapsulations supplements? This is a brand my doctor recommends for me. I have no issues with this brand.
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