Stridor in a Child Stridor Present Since Infancy No Respiratory Distress Laryngomalacia Respiratory Distress Laryngomalacia Laryngeal Web Hemangioma Vocal Cord Dysfunction Subglottic Stenosis Stridor Not Present Since Infancy Non-Acute Onset Hemangioma Vocal Cord Dysfunction Subglottic Stenosis Laryngeal Papillomatosis Acute Onset Febrile Peritonsillar / Retropharyngeal Abscess Epiglottitis Mononucleosis Bacterial Tracheitis Afebrile Barking Cough Croup Atypical Croup Partially-Treated Bacterial Tracheitis * Indicates acutely life-threatening causes

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