Restrictive Lung Disease USMLE Step 1 Practice Question
A 44-year-old woman who breeds pigeons presents with a 3-week history of recurrent cough, progressive dyspnea, and low-grade fevers (38.2°C) that worsen after cleaning bird cages. Vital signs show HR 102/min, RR 24/min, BP 118/76 mmHg, SpO2 88% on room air. Chest CT reveals diffuse patchy ground-glass opacities throughout bilateral lung fields. Pulmonary function tests show reduced vital capacity. She denies smoking history. Which of the following is the most likely diagnosis?
Answer choices
- APneumocystis jirovecii pneumonia
- BHypersensitivity pneumonitisCorrect answer
- CSarcoidosis
- DCommunity acquired pneumonia
- EIdiopathic pulmonary fibrosis
- FHistoplasmosis
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