HardRespiratory MedicineIdiopathic Pulmonary Fibrosismrcp part 1ukmla
A 67-year-old man presents with a 3-month history of progressive breathlessness on exertion and a dry cough. He is an ex-smoker with a 20 pack-year history. Examination reveals bilateral fine inspiratory crackles at the lung bases. A chest X-ray shows bilateral reticular opacities, predominantly in the lower zones. Pulmonary function tests show a restrictive pattern (FVC 60% predicted, FEV1 65% predicted, FEV1/FVC ratio 0.85). What is the most likely diagnosis?