COPD USMLE Step 1 Practice Question
A 63-year-old male with a 45 pack-year smoking history and COPD presents with progressive cough, unintentional weight loss, and acute confusion. Vital signs show BP 138/82, HR 102, RR 22, SpO2 92% on room air, and temperature 37.2°C. Chest CT reveals a centrally located 4-cm hilar mass. Serum sodium is 121 mEq/L; glucose and renal function are normal. He denies hemoptysis. He takes albuterol and tiotropium regularly. Which of the following is the most likely diagnosis?
Answer choices
- ABronchiectasis
- BSmall cell lung carcinomaCorrect answer
- CPulmonary adenocarcinoma
- DMesothelioma
- EPulmonary hamartoma
- FBronchial carcinoid tumor
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