Asthma USMLE Step 1 Practice Question
A 67-year-old man with a 50 pack-year smoking history presents with persistent cough, hemoptysis, and 8-pound weight loss over two months. Vital signs show BP 138/86, HR 92, RR 18, temperature 37.2°C, SpO2 94% on room air. Chest CT reveals a central cavitary hilar mass. Serum calcium is 11.2 mg/dL (normal 8.5-10.5). He denies fever and has no lymphadenopathy on examination. Which of the following is the most likely diagnosis?
Answer choices
- ASmall cell carcinoma
- BSquamous cell carcinomaCorrect answer
- CAdenocarcinoma
- DCarcinoid tumor
- EMesothelioma
- FLarge cell carcinoma
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