Lung cancer and mesothelioma Quiz: Ace Your Exams

Get ready to dominate your medical and nursing exams by using our dynamic quizzes to elevate your knowledge and increase your confidence. Whether you're gearing up for the USMLE®, COMLEX®, or your next in-class assessment, Osmosis quizzes tackle key topics in pathology, diagnostics, and treatment approaches. By honing in on clinical readiness and decision-making, we make sure the knowledge you gain empowers you both in the classroom and in real-world practice. Jump in and supercharge your exam prep!

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A 67-year-old man comes to the physician’s office due to weight loss and chronic cough for the past 2 months. He also noted streaks of blood mixed in with the sputum. His medical history is significant for smoking 1.5 packs of cigarettes daily for 40 years. The patient's records show that 1 year ago his BMI was 24 kg/m2, and now it is 18 kg/m2. He denies any changes in his diet but reports a decreased appetite. Chest radiograph shows a central nodule in the right lung field. Biopsy of the suspected lesions is performed and histopathology shows small dark cells that stain positive for chromogranin A. Which of the following is most likely to be responsible for the patient’s weight loss?  

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