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False positive blood test result

Dp0155
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Dp0155 Rookie
Dp0155
Posted

Hi everyone 

2 months ago I was suffering with gastrointestinal symptoms having just experienced a bad stomach bug bloating and diarrhoea ect. The dr did a blood test and first found I was malabsorbing vitamin b12 then I tested positive through blood test for celiac and referred for an endoscopy. My symptoms quickly improved with the help of vitamin b12 prescription and a gluten free diet. I’m now curious as to if it’s celiac disease or a temporary  intolerance / malabsorption due to having a stomach bugs before this all happened ? 
 

the reason I ask is because I don’t seem to have a lot of the issues other celiacs have. Even when my symptoms were bad they wernt crippling I was still training intensely on regular basis running and strength training. I had no proper bad fatigue and no crippling joint pain ect. I can also digest lactose and eat a lot of diary. I’ve tried little bits of gluten and appear to be fine (malteasers / wheat containing choclate). 
 

is it possible to get a false positive blood test ? 

  • 2 weeks later...
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ch88 Collaborator
ch88
Posted
On 7/8/2020 at 9:41 AM, Dp0155 said:

is it possible to get a false positive blood test ? 

I think a positive blood test is 98% (or something like that I don't remember the exact number) accurate. 

cyclinglady Grand Master
cyclinglady
Posted
(edited)

When is your endoscopy?  Most doctors do not advise going gluten free until after the endoscopy because ALL celiac disease testing requires you to be on it.  Make sure you are on a full gluten diet two weeks prior to the endoscopy.  
 

Unless you were or are  on a vegan diet and were not supplementing B-12 (which is only on animal products naturally), your deficiency, plus a positive on the celiac test strongly leads to a celiac disease diagnosis.

I ran a 1/2 marathon and a few century bike rides the year prior to my diagnosis.  Anemia was my only symptom.   Some celiacs are asymptomatic.  
 
 

 

Edited by cyclinglady
RMJ Mentor
RMJ
Posted

False positives are possible, although unlikely.  It is very possible to have celiac disease without symptoms, but with intestinal damage.

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