Food protein-induced enterocolitis syndrome to trivial oral mucosal contact

Food protein-induced enterocolitis syndrome (FPIES) is a non-immunoglobulin E (IgE)-mediated gastrointestinal food hypersensitivity, mostly in infants. Patients usually present very ill and often misdiagnosed as acute gastroenteritis, sepsis, ileus, metabolic disorders, necrotizing enterocolitis, or severe gastroesophageal reflux disease. We present a case of an infant who had three acute FPIES episodes: the first was at 5 months of age after chewing on a cellophane wrapper, the second was due to sweet potato, and the third was due to rice cereal. It was realized that in the first episode, the wrapper was covering a rice cake. Evaluation at 7 months of age, while asymptomatic, showed normal complete blood count, low serum immunoglobulin E level, and negative allergy skin prick tests, indicating non-IgE sensitivity. Conclusion This case of FPIES has peculiar features in that it occurred in an exclusively breastfed infant and by non-ingestant oral contact with a trivial quantity of rice allergen.