Panacinar emphysema is linked to which?

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Multiple Choice

Panacinar emphysema is linked to which?

Panacinar emphysema arises from a deficiency of alpha-1 antitrypsin, a protease inhibitor produced by the liver. When this inhibitor is lacking, neutrophil elastase runs unchecked and destroys elastic tissue across the alveolar walls of the acini, producing the diffuse, uniform damage termed panacinar emphysema. This pattern often shows preferential involvement of the lower lobes. The other options don’t explain this mechanism: polycythemia is a compensatory response to chronic hypoxia, not a cause of emphysema; a bronchodilator is a treatment for symptoms rather than a disease link; and while alpha-1 antitrypsin is produced by hepatocytes, the key clinical connection is the deficiency of this antiprotease leading to lower-lobe–predominant panacinar destruction.

Panacinar emphysema arises from a deficiency of alpha-1 antitrypsin, a protease inhibitor produced by the liver. When this inhibitor is lacking, neutrophil elastase runs unchecked and destroys elastic tissue across the alveolar walls of the acini, producing the diffuse, uniform damage termed panacinar emphysema. This pattern often shows preferential involvement of the lower lobes. The other options don’t explain this mechanism: polycythemia is a compensatory response to chronic hypoxia, not a cause of emphysema; a bronchodilator is a treatment for symptoms rather than a disease link; and while alpha-1 antitrypsin is produced by hepatocytes, the key clinical connection is the deficiency of this antiprotease leading to lower-lobe–predominant panacinar destruction.

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