A 75-Year-Old Man Is Discovered Unconscious in His Home

A 75-year-old man is discovered unconscious in his home. The neighbor summons emergency medical services, but the patient is pronounced dead at the scene. The patient had a history of hypertension, type 2 diabetes, and coronary artery disease, as well as a smoking history of 25 packs per year. He used to work in a coal mine and retired as an auto mechanic 15 years ago. An autopsy is performed; below is a section of lung tissue stained with hematoxylin and eosin. Which of the following is the most likely cause of this patient's abnormal histopathology findings?

A) Chronic inflammation triggered by crystalline silica
B) Decreased left ventricular systolic function
C) Excessive deposition of extracellular collagen
D) Hyperreactivity of airways to extrinsic allergens
E) Malignant transformation of bronchial epithelial cells
F) Neutrophil elastase-mediated alveolar septal destruction

Correct Answer:

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