Restrictive Lung Disease USMLE Step 1 Practice Question
A 33-year-old man hospitalized for severe pancreatitis develops acute dyspnea on hospital day 3. Vital signs: BP 128/82 mmHg, HR 112/min, RR 28/min, SpO2 88% on room air. Chest X-ray shows bilateral ground-glass opacities. Arterial blood gas reveals PaO2 55 mmHg. He denies chest pain and has clear bilateral breath sounds. Recent labs show elevated amylase and lipase. Lung biopsy would most likely demonstrate which pathological process?
Answer choices
- ASideroblast macrophages in bronchoalveolar lavage
- BDiffuse bilateral ground glass opacities
- CNoncaseating granulomas
- DAcute respiratory distress syndromeCorrect answer
- EFerruginous bodies in macrophages
- FFibrinoid necrosis of small pulmonary vessels with neutrophilic infiltration
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