| Upper Respiratory Tract | Middle Respiratory Tract | Lower Respiratory Tract |
| Allergic rhinitis | Bronchial stenosis | Asthma |
| Adenoid/tonsillar hypertrophy | Enlarged lymph nodes | Bronchiectasis |
| Foreign body | Epiglottitis | Bronchopulmonary dysplasia |
| Infectious rhinitis | Foreign body | Chlamydia trachomatis |
| Sinusitis | Laryngeal webs | Chronic aspiration |
| Laryngomalacia | Cystic fibrosis | |
| Laryngotracheobronchitis | Foreign body | |
| Mediastinal lymphadenopathy | Gastroesophageal reflux | |
| Pertussis | Hyperventilation syndrome | |
| Toxic inhalation | Obliterative bronchiolitis | |
| Tracheoesophageal fistula | Pulmonary hemosiderosis | |
| Tracheal stenosis | Toxic inhalation, including smoke | |
| Tracheomalacia | Tumor | |
| Tumor | Viral bronchiolitis | |
| Vascular rings | ||
| Vocal cord dysfunction | ||
Reference:
Nelson Essential of Pediatrics 6th Edition