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Igg/iga/ttg


Mom22

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Mom22 Apprentice

Both our daughter and son have been diagnosed with celiac disease this year via biopsies. Both were asymptomatic, but our son was experiencing constipation which warranted further testing. It was only through a diligent pediatrician did he order several blood screens and one was the gluten enterpathy and that started the ball rolling. He had a biopsy, came back positive, then his sister, had blood work, was elevated, had a biopsy which was inconclusive and had a second opinion by Dr. Fasano of her biopsy slides, which was positive for celiac. I had bloodwork done and all screens were negative. My husband had bloodwork done and also the HLA test and he does have the DQ2 & DQ8 genes. His IGG (112) and IGA (27) are elevated, but the TTG (4) is within normal limits. My husband is seeing Dr. Fasano in September. Due to knowing that the celiac came through my husband's side of the family, we advised his parents to have the initial blood screen done. My mother in law has had her test and the nurse practioner of her family physician called and said she was negative. She didn't have any of the #'s of the results. I asked her if she could get a copy and mail it to me only because initially, my husband's dr. said he was negative, but then when we received a copy of the results, we pursued further testing. I am a work in progress as far as my knowledge of celiac goes, but her results, I think may warrant further testing or seeing a specialist. Please tell me if I am wrong as I don't want to alarm my mother in law. I realize my mother in law could be a carrier and the celiac has not and may never develop in her. My father in law hasn't had his blood work done yet. What do you think?

My mother in law's results.

IGG: 27.7

IGA 42.1

TTG 6

Thanks for an light you can shed on this.

Mom 2 2 celiac children


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mat4mel Apprentice

I am totally confused.. all of those results sound positive for celiac to me.. why would they say they were negative?

Mom22 Apprentice

Thanks. You just confirmed what I have been thinking all along. I thought the same thing, but they are telling my mother-in-law that her results are negative. I am thinking otherwise. Thank you for your input.

lovegrov Collaborator

Also sounds positive to me.

richard

gf4life Enthusiast

Here is my interpretation. See, my doctors office considers (wrongly) anything under 30 to be negative on the IgA and IgG, and under 20 negative on the tTg. So my interpretation is that they are ignoring the obviously positive IgA, since they seem to think the other two are negative.

The problem with this is that the blood tests are NOT as accurate as the doctors think and with even one of them showing positive then it is most likely celiac. Either further testing or a trial gluten-free diet is in order, but I don't recommend the diet until after the biopsy, assuming a biopsy might happen in the future. I personally chose Enterolab after the doctors insisted for two years that my tests were all negative, and the biopsy performed after being gluten-free was negative. Enterolab showed that I not only had the genes, but was producing positive level antibodies to gluten and casein in my intestines, but I did not have severe damage to my intestines (probably since they healed partially while I was gluten-free!).

I hope your mother-in-law doesn't have to be sick for long. Please urge her to get more testing done (or try the diet).

God bless,

Mariann

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    • Scott Adams
      Based on those results alone, it’s not possible to say you have celiac disease. The test that is usually most specific for celiac, tTG-IgA, is negative in your results, and the endomysial antibody (EMA) is also negative, which generally argues against active celiac disease. However, your deamidated gliadin IgA is elevated, and your total IgA level is also high, which can sometimes affect how the other antibody tests behave. Another important factor is that you were reducing gluten before the test, which can lower antibody levels and make the results less reliable. Because of that, many doctors recommend a gluten challenge (eating gluten regularly for several weeks) before repeating blood tests or considering an endoscopy if symptoms and labs raise concern. It would be best to review these results with a gastroenterologist, who can interpret them in context and decide whether further testing is needed.
    • trents
      Since you compromised the validity of the antibody testing by experimenting with gluten withdrawal ahead of the testing, you are faced with two options: 1. Reintroduce significant amounts of gluten into your diet for a period of weeks, i.e., undertake a "gluten challenge". The most recent guidelines are the daily consumption of at least 10g of gluten (about the amount found in 4-6 slices of wheat-based bread) for at least two weeks leading up to the day of testing. Note: I would certainly give it more than two weeks to be sure. 2. Be willing to live with the ambiguity of not knowing whether gluten causes you problems because you have celiac disease or NCGS (Non Celiac Gluten Sensitivity). There is no test for NCGS. Celiac disease must first be ruled out and we have tests for it. Celiac disease has an autoimmune base. NCGS does not. GI symptoms overlap. In the early stages of celiac disease, other body systems may not be showing stress or damage so, symptomatically, it would be difficult to distinguish between celiac disease and NCGS. Both conditions require elimination of gluten from the diet for symptom relief. Some experts feel that NCGS can be a precursor to celiac disease.
    • suek54
      Hi Kayla Huge sympathies. I was diagnosed in December, after 8 months of the most awful rash, literally top to toe. Mine is a work in progress. Im on just 50mg dapsone at the moment but probably need an increased dose to properly put the lid on it. As you have been now glutened, I wondered whether it might be worth asking for a skin biopsy to finally get a proper diagnosis? Sue  
    • MicG
      I had been eating reduced gluten until about 3 days before the test. I did realize that wasn’t ideal, but it was experimental to see if gluten was actually bothering me. One slip up with soy sauce and it was quite clear to me that it was, lol. 
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      Possibly. Your total IGA (Immunoglobulin A, Qn, Serum) is actually high so you are not IGA deficient. In the absence of IGA deficiency, the most reliable celiac antibody test would be the t-Transglutaminase (tTG) IgA for which your score is within normal range. There are other things besides celiac disease that might cause an elevated DGP-IGA (Deamidated Gliadin Abs, lgA) for which you do have a positive score. It might also be of concern that your total IGA is elevated as that can indicate some other health problems, some of which are serious.  Had you been practicing a gluten free or a reduced gluten free diet prior to the blood draw? Talk to your physician about these things. I would also seek an endoscopy/biopsy of the small bowel to check for damage to the villous lining, which is the gold standard diagnostic test for celiac disease.
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