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Restrictive lung disease — ABFM Board MCQ

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HardRespiratoryRestrictive lung diseaseABFM Board

A 55-year-old woman with systemic sclerosis reports progressive exertional dyspnea. Spirometry shows reduced FVC with a normal FEV1/FVC ratio. Oxygen saturation falls with exertion. Which of the following is the most appropriate next step?

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Correct answer: E — Order full pulmonary function testing and high-resolution chest CT

Restrictive spirometry and systemic sclerosis raise concern for interstitial lung disease; full PFTs and high-resolution CT help confirm and stage disease.

Reference: American Family Physician clinical reviews and AAFP guidance: https://www.aafp.org/pubs/afp.html