Asbestosis classically affects which part of the lungs?

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Study for the Respiratory CAS Exam. Practice with detailed questions and comprehensive explanations to ensure you understand the material thoroughly. Enhance your proficiency and confidence to pass the exam successfully!

Multiple Choice

Asbestosis classically affects which part of the lungs?

Explanation:
Asbestosis shows a basilar, subpleural pattern of fibrosis. Inhaled asbestos fibers settle in the lower parts of the lungs and lungs’ subpleural zones, where clearance is slower, leading to fibrotic scarring that predominates in the lower lobes. This basilar predominance is a key feature, often with pleural plaques nearby on imaging. That’s why the lower lobes are classically involved, rather than the upper or middle regions or the whole lung.

Asbestosis shows a basilar, subpleural pattern of fibrosis. Inhaled asbestos fibers settle in the lower parts of the lungs and lungs’ subpleural zones, where clearance is slower, leading to fibrotic scarring that predominates in the lower lobes. This basilar predominance is a key feature, often with pleural plaques nearby on imaging. That’s why the lower lobes are classically involved, rather than the upper or middle regions or the whole lung.

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