This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of the Respiratory Tract, Subject name: Pediatrics
A 2-year-old child with H/O fever and cough and sudden onset respiratory distress presents to you in the emergency department. X-ray was done, displayed below, the most probable diagnosis is-- 
Select and explain. 
A. Abscess, B. Pneumatoceles, C. Consolidation, D. Pneumothorax
B: Pneumatoceles
Answer: B: Pneumatoceles 
Explanation: Ans. is 'b' i.e., Pneumatoceles o Pneumatoceles are frequent with staphylococcal infections, and they should not be confused with a pulmonary abscess. Pneumatoceles have thin, smooth walls and are seen with an improving clinical picture, whereas pulmonary abscesses have thick, irregular walls with an air-fluid level and the child tends to be very ill Pneumatoceles are thought to be a form of localized pulmonary' interstitial emphysema and are self-limiting with only the rare case of a large; persisting pneumatocele needing surgery.