Snapshot A 4-year-old boy presents to the emergency room for a cough. His mom reports that he has had this cough for about a day along with fevers, runny nose, and a hoarse voice. He started having some difficulty breathing this afternoon, so his mother brought him to the emergency room. On physical exam, he has a deep barking cough, use of accessory muscles, and inspiratory stridor. He is sent for a chest radiograph, which showed a positive steeple sign. He is immediately given nebulized epinephrine and a dose of steroids. The physician reassures the patient’s mother that this will likely resolve without any complications. Introduction Clinical definition login to view 1 more bullet Epidemiology login to view 5 more bullets Etiology login to view 6 more bullets Pathogenesis login to view 3 more bullets Associated conditions login to view 1 more bullet Prognosis login to view 1 more bullet Presentation Symptoms login to view 6 more bullets Physical exam login to view 5 more bullets Imaging Chest radiography login to view 4 more bullets Studies Making the diagnosis login to view 1 more bullet Differential Acute epiglottitis login to view 4 more bullets Treatment Conservative login to view 6 more bullets Medical login to view 6 more bullets Complications Respiratory failure Pneumonia