Which sign is indicative of epiglottitis?

The thumb sign is indicative of epiglottitis and is observed in radiographic images of the neck. This sign refers to the appearance of the swollen epiglottis, which resembles a thumb on lateral neck X-rays. In cases of epiglottitis, the epiglottis becomes inflamed and enlarged, obstructing the airway and presenting a serious medical concern, especially in young children. The early recognition of this sign can be critical for prompt intervention, as epiglottitis can lead to acute airway obstruction if not treated quickly.

In contrast, the steeple sign is associated with croup (laryngotracheobronchitis) and indicates subglottic narrowing. The bell sign and claw sign are not widely recognized terms in relation to these specific conditions. Understanding these signs helps in the differential diagnosis of respiratory distress in pediatric patients.