Abstract
A 1-month-old male, exclusively breastfed, presented with 24 h of bloody stools, vomiting, metabolic acidosis, and pneumatosis intestinalis. The patient was initially treated for necrotizing enterocolitis (NEC). However, after suspecting food protein-induced enterocolitis syndrome (FPIES), oral feeding was resumed using an exclusive elemental formula, and the biochemical and radiological findings were resolved.