1 MCQs in Medicine for NEET PG
A 68-year-old man presents with 18 months of progressive exertional dyspnea and dry cough. Examination reveals bibasilar fine "velcro" crackles and finger clubbing. HRCT shows basal, subpleural reticulation with honeycombing and traction bronchiectasis. Spirometry reveals FEV1 62% predicted, FVC 60% predicted, FEV1/FVC 0.88 (preserved), TLC 58% predicted, and DLCO 42% predicted. The flow-volume loop marked **B** in the diagram is small and narrow with preserved shape. Which of the following best describes the pattern of pulmonary dysfunction represented by the structure marked **B**?
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