Asthma USMLE Step 1 Practice Question
A 58-year-old man with a 40-pack-year smoking history presents with progressive dyspnea on exertion and difficulty climbing stairs. Vital signs show BP 142/88 mmHg, HR 102 bpm, RR 24/min, and SpO2 88% on room air. Physical examination reveals proximal muscle weakness that paradoxically improves with repeated contractions. Chest CT demonstrates a central hilar mass. Recent labs show elevated creatine kinase. He denies diplopia or ptosis. Which of the following is the most likely diagnosis?
Answer choices
- APancoast tumor
- BAdenocarcinoma
- CSmall cell carcinomaCorrect answer
- DMesothelioma
- ESquamous cell carcinoma
- FLarge cell carcinoma
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