Larynx fracture
Tracheobronchial tear/injury
Thyroid gland injury/trauma
Tracheal injury
Electromagnetic or radiation exposure
Burns, inhalation injury
Bacterial tracheitis
Diphtheria
Tetanus
Tracheobronchial tuberculosis
Poliomyelitis, paralytic, bulbar, or acute
Fungal laryngitis
Retropharyngeal abscess
Epiglottitis, acute
Peritonsillar abscess
Laryngotracheobronchitis (croup)
Retropharyngeal abscess
Neoplasms/tumors
Spasmodic/tracheobronchitis
Angioedema/Angioneurotic edema
Cerebral Gaucher's of infants (acute)
Tracheobronchial amyloidosis
Tetany
Angioedema/Angioneurotic edema, hereditary
Somatization disorder
Foreign body aspiration
Acute gastric acid/aspiration syndrome
Airway obstruction
Neck compartment hemorrhage/hematoma
Paradoxical vocal fold motion 
Esophageal free reflux/GERD syndrome
Laryngospasm, acute
Bilateral vocal cord paralysis
Hypoparathyroidism
Bilateral vocal cord paralysis
Smoke inhalation
Chemical burn/esophagus
Laryngotracheomalacia<unk>  or prior intubation
Vascular ring (double aortic arch)
Vocal cord dysfunction/paroxysmal vocal fold movement
Subglottic stenosis
Larynx fracture
Tracheomalacia
Tracheobronchial tear/injury
Bacterial tracheitis
Thyroid gland injury/trauma
Retropharyngeal abscess
Tracheal injury