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For a brief introduction and guide to abbreviations, see Laboratory Tests: General Remarks.
Analyte [material]
Reference range, target level, or decision threshold
<50 microg/g
Interpretation of results
>250 microg/g: IBD, GI infections, GI tract malignancies, colonic diverticulosis, use of NSAIDs
50-250 microg/g: Cirrhosis, microscopic colitis, celiac disease and other enteropathies, PUD, gastritis, reflux esophagitis, food allergy, small intestinal bacterial overgrowth, use of PPIs
