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Review Question - QID 109641

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QID 109641 (Type "109641" in App Search)
A 61-year-old male presents to the emergency room with difficulty breathing. He has had a dry cough and shortness of breath for the last 6 days. This morning, his cough acutely worsened prompting him to seek care. His temperature is 99.0°F (37.2°C), blood pressure is 140/85 mmHg, pulse is 110/min, respirations are 27/min, and pulse oximetry is 88% on room air. There are decreased breath sounds at the right lung base. Chest radiograph is shown in Figure A. You perform a thoracentesis and pleural fluid findings are shown below:

Appearance: Clear
Lactate dehydrogenase: 40 U/L
Specific gravity: 1.01
Leukocyte count: 200/mm^3
Erythrocyte count: Trace
Gram stain: Negative

Which of the following is the most likely underlying etiology for this patient’s respiratory distress?
  • A
  • A