A 1-year-old boy was presented with a 3-day history of intermittent fever, cough, and hoarseness. Examination Physical examination indicated neck lymphadenopathy and audible stridor. However, he was neither in a respiratory distress nor drooling. The oropharyngeal examination was unremarkable.

A chest radiograph was acquired. What can be detected from the chest radiograph? *This case is from Docplexus editorial team for educative purpose only. Source: NEJM Stay Connected, the answer will be posted in the next 48h!