Describe the etiology.
Type of pneumoconiosis caused by inhalation of asbestos fibers
List risk factors.
Occupations involving the manufacture or demolition of ships, plumbing, roofing, insulation, heat-resistant clothing, and brake lining
Smoking
Describe the pathophysiology.
Inhalation of airborne asbestos fibers into alveoli → inflammation and fibrosis of pleural parenchyma → risk of carcinogenic effects
A high cumulative dose of asbestos is associated with a higher incidence of asbestosis. In smokers, the disease progresses more rapidly because mucociliary clearance is impaired.
List clinical features.
Long latent period
Exertional dyspnea
Dry cough → productive cough
Digital clubbing
Bilateral fine, basal end-inspiratory rales
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