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Food protein-induced enterocolitis syndrome (FPIES) is a non-IgE cell mediated food allergy triggered by the ingestion of specific food proteins that may manifest in an acute or chronic form. We report a case of an infant with severe chronic FPIES presenting in the neonatal period that failed to respond to amino acid-based formulas. The patient remained on total parenteral nutrition for 4 weeks and after that he could tolerate amino acid formula. Our case suggests that bowel rest for extended periods may be necessary for severe cases of FPIES, while endoscopy may be helpful in the differential diagnosis and the therapeutic management of these cases. [ABSTRACT FROM AUTHOR]