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Stridor - Differential Diagnosis Framework:
High-pitched, variable respiratory sound

ETIOLOGIES:
Infectious:
 • Retropharyngeal abscess
 • Acute epiglottitis
 • Peritonsillar
Retropharyngeal abscess ... Mechanical: • Larynx fracture ... Foreign body Allergic ... differential #diagnosis #causes ... pulmonary #airway #physicalexam