A 55-year-old male with a 30 pack-year smoking history presents with chronic productive cough and progressive exertional breathlessness. Post-bronchodilator spirometry demonstrates an FEV1/FVC ratio of 0.62 and an FEV1 of 58% predicted. According to GOLD guidelines, what diagnosis is established?

Answer and explanation

Correct answer: C. Chronic Obstructive Pulmonary Disease (COPD)

  1. Step 1: According to GOLD guidelines, a post-bronchodilator FEV1/FVC ratio < 0.70 confirms the presence of persistent airflow limitation characteristic of COPD.
  2. Step 2: An FEV1 between 50% and 79% of predicted values corresponds to GOLD Stage 2 (Moderate COPD).
Answer
Chronic Obstructive Pulmonary Disease (COPD).
Why not the others: 'Extrinsic Allergic Bronchial Asthma' is characterized by reversible airflow limitation (significant FEV1 improvement >12% and >200 mL following bronchodilator challenge); 'Idiopathic Pulmonary Fibrosis' produces a restrictive pattern with preserved or elevated FEV1/FVC (>0.70) and reduced total lung capacity; 'Bronchiectasis with Restrictive Defect' is typically obstructive with signature signet-ring sign on HRCT.

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