IgE-mediated Mechanism Mixed mechanism:   IgE-mediated and non-IgE Non-IgE-mediated mechanism
Immediate gastrointestinal hypersensitivity Eosinophilic esophagitis Food protein-induced allergic proctocolitis
Oral allergy syndrome Eosinophilic gastroenteritis Food protein-induced enterocolitis syndrome
Table 1: Classification of gastrointestinal food allergy.