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An 11-month-old Japanese girl was diagnosed with food protein-induced enterocolitis syndrome (FPIES) after presenting with vomiting approximately two hours after wheat intake. She showed positive results on the first wheat oral food challenge (OFC) at nine months of age, although serum wheat- and ω-5 gliadin-specific immunoglobulin E (IgE) were not detected. The second wheat OFC, performed at age 13 months, induced wheezing (usually an IgE-mediated symptom) 4.5 hours after ingestion, probably owing to gastroesophageal reflux caused by repetitive vomiting. The third wheat OFC, performed at age 25 months, did not trigger reactions. Therefore, gradual low-dose wheat was reintroduced at home. The fourth wheat OFC performed at age 30 months induced no response either; thus, the patient was deemed to have developed tolerance to wheat. This case report, therefore, demonstrates that careful assessment of natural history and physician-supervised OFCs are necessary for adequate diagnosis and the successful management of reintroduction in wheat-induced FPIES.

Wheat Protein-Induced Enterocolitis Syndrome Complicated With Wheezing: An Approach to Diagnosis and Wheat Reintroduction