Centriacinar emphysema is most strongly associated with which pattern?

Prepare for the Respiratory CAS Exam with comprehensive quizzes. Utilize flashcards and multiple choice questions, each crafted with detailed explanations and hints. Equip yourself for success in your test!

Multiple Choice

Centriacinar emphysema is most strongly associated with which pattern?

Centriacinar emphysema describes destruction centered around the proximal parts of the acinus, around the respiratory bronchioles, and it most prominently involves the upper lobes. This distribution fits smoking-related lung injury, where inhaled toxins trigger inflammation that releases proteases like elastase, tipping the protease–antiprotease balance toward tissue destruction near the airways. The result is airspace enlargement concentrated around the central parts of the acinus, seen predominantly in the upper lung zones. In contrast, emphysema due to alpha-1 antitrypsin deficiency is typically panacinar, with more uniform involvement that often affects the lower lobes. The hepatic endoplasmic reticulum mention is about where the deficient enzyme is produced rather than its pattern of lung involvement, so it’s a distractor. Bronchiectasis represents a different airway pathology characterized by permanently dilated bronchi with mucus production, not the centriacinar destruction pattern described here.

Centriacinar emphysema describes destruction centered around the proximal parts of the acinus, around the respiratory bronchioles, and it most prominently involves the upper lobes. This distribution fits smoking-related lung injury, where inhaled toxins trigger inflammation that releases proteases like elastase, tipping the protease–antiprotease balance toward tissue destruction near the airways. The result is airspace enlargement concentrated around the central parts of the acinus, seen predominantly in the upper lung zones.

In contrast, emphysema due to alpha-1 antitrypsin deficiency is typically panacinar, with more uniform involvement that often affects the lower lobes. The hepatic endoplasmic reticulum mention is about where the deficient enzyme is produced rather than its pattern of lung involvement, so it’s a distractor. Bronchiectasis represents a different airway pathology characterized by permanently dilated bronchi with mucus production, not the centriacinar destruction pattern described here.

More practice questions