Epiglottitis

On the left, an endoscopic view of the throat shows almost complete blockage of the airway (arrow). This finding is typical of epiglottitis. On the right, the airway has been opened (arrow) after insertion and removal of an endotracheal tube, although some redness and blood remain.

(From KJ Knoop, Atlas of Emergency Medicine, 1997, McGraw-Hill, Fig. 14.37-38, courtesy Department of Otolaryngology, Children's Hospital Medical Center, Cincinnati; with permission.)