| On immunological basis: unanimous |
| 1) Type I: IgE-mediated reactions |
| a) Systemic |
| Anaphylactic shock |
| b) Gastrointestinal |
| Early-onset enteropathy |
| Nausea, colics, diarrhea, vomiting, abdominal pain |
| Allergic eosinophilic gastroenteritis (some forms) |
| c) Cutaneous |
| Atopic dermatitis, erythema |
| Urticaria-Angioedema |
| d) Respiratory |
| Wheezing, sneezing, cough, rhinorrhea |
| Rhinoconjunctivits |
| 2) Type II: Cytotoxic reactions |
| CM-induced thrombocytopenia |
| Recurrent pneumonia (Heiner syndrome) |
| 3) Type III: by immune complexes |
| Celiac disease |
| Colitis syndrome |
| Dermatitis herpetiformis |
| Serous otitis |
| Enterocolitic syndrome |
| Malabsorption syndrome |
| Pulmonary hemosiderosis |
| Sideropenic anemia sometimes with occult blood loss |
| 4) Type IV: Cell-mediated hypersensitivity |
| Celiac disease |
| Dermatitis herpetiformis |
| Enterocolitic syndrome |
| Malabsorption syndrome |
| Pulmonary hemosiderosis |
| On nonimmunological basis: not unanimous |
| Attention deficit hyperactivity disorder |
| Crohn's disease |
| Eosinophilic enteropathy |
| Gastroesophageal reflux |
| Infantile colitis |
| Insomnia |
| Recurrent periostitis |
| Recurring stomatitis |
| Tension-fatigue syndrome |
| Vasculitis |
