A 72-Year-Old Man Comes to the Office After Several Days

A 72-year-old man comes to the office after several days of mild headache and lethargy.  He has also had weakness, chronic cough, and decreased appetite.  He drinks 2 or 3 beers each weekend and has a 40-pack-year smoking history.  Temperature is 37 C (98.6 F) , blood pressure is 120/84 mm Hg, pulse is 78/min, and respirations are 24/min.  Lung examination shows mildly prolonged expiration with end-expiratory wheezes.  Laboratory results are as follows: Chest x-ray reveals overinflated lung fields and a 2.5-cm left hilar mass.  Biopsy of the mass would most likely show which of the following?

A) Carcinoid tumor
B) Lung adenocarcinoma
C) Lymphoma
D) Mesothelioma
E) Small cell lung cancer
F) Squamous cell lung carcinoma

Correct Answer:

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