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Question about biopsy


somethinglikeolivia
Go to solution Solved by Scott Adams,

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somethinglikeolivia Rookie

When I underwent a scope three years ago, the GI told me I was negative for celiac because there was no intestinal damage (in spite of multiple strong positive labs). I went back to look at my biopsy report out of curiosity, and found this note:

“Localized mild nodular mucosa was found in the duodenal bulb. Duodenum otherwise normal.”

The pathology from this scope was negative. Does anyone have any insight into mild modular mucosa and what that could indicate or be a precursor to? I’ve read it can be a sign of celiac or other gut issues like h. Pylori, etc. 

Thanks in advance! 


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  • Solution
Scott Adams Grand Master

Your experience highlights a common frustration in celiac disease diagnosis—discrepancies between lab results, biopsy findings, and clinical symptoms. The "localized mild nodular mucosa" noted in your duodenal bulb could indeed be significant, even if the overall pathology was deemed negative. Nodularity in the duodenum is often associated with lymphocytic infiltration, a feature seen in early celiac disease (before villous atrophy develops) or in conditions like H. pylori infection, chronic inflammation, or even food sensitivities (e.g., gluten or dairy). Since you had strongly positive celiac labs (e.g., TTG-IgA, EMA, or DGP), this nodularity might reflect an early or patchy immune response to gluten that wasn’t severe enough to meet traditional biopsy criteria (Marsh 3 damage). Some studies suggest nodular mucosa can precede classic celiac changes, especially in seropositive patients.

Given your lab results and symptoms, it’s possible you have non-celiac gluten sensitivity (NCGS) or are in an early stage of celiac where damage isn’t yet widespread. False-negative biopsies aren’t uncommon due to sampling error (celiac can be patchy) or misinterpretation of subtle changes. If you’re still symptomatic, you might discuss repeat testing (e.g., HLA-DQ typing if not already done, or a gluten challenge with both serology and biopsy) or consider a capsule endoscopy, which can visualize more of the small intestine. Alternatively, H. pylori testing or a trial of strict gluten-free diet with symptom monitoring could provide clarity. Your case underscores the importance of correlating labs, histology, and clinical response—not just relying on biopsy alone. A second opinion from a celiac-savvy GI could be worthwhile!

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