Approach to a cough (subacute and chronic) Quiz: Ace Your Exams
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A 62-year-old man presents to the primary care clinic due to a persistent cough that began four months ago. The cough is dry without sputum production. Recently, he has experienced more difficulty walking around the house, and he needs to stop to catch his breath while doing daily life activities. His past medical history is unremarkable, and he takes no medications. Temperature is 37.0 ºC (98.6 ºF), pulse is 90/min, respiratory rate is 20/min, blood pressure is 110/71 mmHg, and oxygen saturation is 89% on room air. On physical examination, the patient appears fatigued. There are fine inspiratory crackles throughout both lungs, and finger clubbing is noted. A chest radiograph shows multiple reticulonodular opacities. High-resolution computed tomography (CT) imaging of the chest is ordered. Which of the following is the most likely diagnosis?
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