COPD Pathology

A 62-year-old man from Delhi presents with progressive dyspnea on exertion, chronic cough productive of scanty mucoid sputum, and recurrent lower respiratory tract infections over the past 8 years. He has a 40 pack-year smoking history. On examination, he has barrel chest, pursed-lip breathing, and prolonged expiration. Spirometry shows FEV₁/FVC ratio of 0.58 with FEV₁ 45% of predicted. High-resolution CT chest reveals emphysematous changes predominantly in the upper lobes and apices. Which pathological process best explains the irreversible airflow obstruction in this patient?

A 58-year-old woman with a 35 pack-year smoking history presents with chronic productive cough, recurrent bronchitis, and mild dyspnea. Spirometry shows FEV₁/FVC of 0.64 with FEV₁ 68% predicted. Chest X-ray demonstrates prominent bronchial markings and bronchial wall thickening. Sputum culture grows Haemophilus influenzae. On pathological examination of a lung biopsy, there is mucus gland hyperplasia in the bronchi with an increased Reid index (ratio of mucous gland layer to total bronchial wall thickness) of 0.65. Which of the following best describes the primary pathological process in this patient?

In COPD, which of the following mechanisms is responsible for the development of cor pulmonale?

A 58-year-old male smoker with 40 pack-year history presents with progressive dyspnea and a DLCO of 45% predicted. On histology, there is loss of alveolar walls predominantly in the upper lung lobes with sparing of the lower lobes. Which feature best distinguishes this type of emphysema from panacinar emphysema?

A 62-year-old man with a 40 pack-year smoking history presents with progressive dyspnea on exertion, chronic productive cough, and recurrent lower respiratory tract infections over the past 3 years. Spirometry shows FEV₁/FVC ratio of 0.58 with FEV₁ 45% predicted. High-resolution CT chest reveals extensive centrilobular emphysema with bronchial wall thickening. Pathological examination of a lung biopsy shows destruction of alveolar walls with loss of elastic recoil and enlarged air spaces distal to the terminal bronchioles. Which of the following best describes the primary pathological lesion in this patient?