Question 1

Question

A 44-year-old man with a 20-pack-year smoking history presents with progressive exertional dyspnea over 18 months. He denies cough, fever, or weight loss. Pulmonary function testing is performed. FEV₁/FVC is 0.58, FVC is 92% of predicted, FEV₁ is 61% of predicted, and there is no significant bronchodilator response (improvement in FEV₁ <12%). DLCO is 48% of predicted. Which of the following best characterizes the physiologic pattern and its most likely underlying cause?

Accepted Answer

Obstructive pattern with reduced gas transfer, most consistent with emphysema-predominant COPD

Answer

Obstructive pattern with preserved gas transfer, most consistent with asthma

Answer

Restrictive pattern with reduced gas transfer, most consistent with idiopathic pulmonary fibrosis

Answer

Mixed obstructive-restrictive pattern, most consistent with combined pulmonary fibrosis and emphysema

Answer

Obstructive pattern with reduced gas transfer, most consistent with hypersensitivity pneumonitis

Endocrinology (diabetes, thyroid disorders) — MCQs

Endocrinology (diabetes, thyroid disorders) — MCQs

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