Useful Biomarkers in Pediatric Eosinophilic Duodenitis and Their Existence: A Case‐control, Single‐blind, Observational Pilot Study

Abstract

Allergy screening for the foods tested was not useful as a biomarker for eosinophilic duodenitis in this small study. A higher rate of positive reactions to patch testing was observed in the control group than previous studies have reported. The incidence of a positive food patch test in nonselected subjects needs further investigation. Method standardization and establishment of reference intervals are needed for atopy patch tests, SIgG, and SIgG4 to better evaluate the clinical value of these measures.