Non-IgE-mediated gastrointestinal food allergies (non-IgE-GIFA) are an evolving web of clinical conditions characterized by subacute and/or chronic symptoms and include food protein-induced enterocolitis syndrome (FPIES), food protein-induced enteropathy (FPE), food protein-induced allergic proctocolitis (FPIAP), and food protein-induced allergic dysmotility disorders (gastroesophageal reflux disease (GERD), colic and constipation) (FPIMD).

Despite the prevalence and clinical impact of these conditions, the pathogenesis as well as the natural history and the best management of these disorders are still poorly defined. These limitations could be responsible for diagnostic delays and errors, and suboptimal clinical management. We aim to evaluate clinical features, natural course and pathophysiology of non-IgE-GIFA in the pediatric age.

Inclusion Criteria:

• subjects aged between 0-14 years
• suggestive history of food allergy

Exclusion Criteria:

• age >14 years-
• chronic systemic diseases,
• malignancy,
• immunodeficiency,
• infectious diseases,
• autoimmune diseases,
• inflammatory bowel diseases,
• celiac disease,
• metabolic and genetic diseases,
• cystic fibrosis,
• chronic pulmonary diseases,
• gastrointestinal, respiratory, urinary tract and/or cardiovascular malformations,
• neurologic and/or neuropsychiatric disorders,
• gastrointestinal tract eosinophilic disorders,
• use of immunomodulating drugs, steroids, pre-pro-synbiotics, antibiotics in the previous 4 months

subjects consecutively observed at the Pediatric Allergy Program, at the Department of Translational Medical Science of the University of Naples Federico II, both sex, aged between 0-14 years with suggestive history of food allergy