The first step is to exclude other obstructive conditions of the upper airway, especially epiglottitis, an airway foreign body, subglottic stenosis, angioedema, retropharyngeal
[en.wikipedia.org]
Initial signs of congenital subglottic stenosis include respiratory tract infection and edema of an already compromised airway.
[americannursetoday.com]
stenosis, which resembles a steeple in shape.
[en.wikipedia.org]
