Lung disease caused by a chronic inhalation of quartz-containing dust in stone masons is called
A. anthracosis
B. asbestosis
C. silicosis
D. progressive massive fibrosis
E. sarcoidosis
C
Chronic inhalation of quartz-containing dust causes silicosis, a pneumoconiosis characterized by formation of fibrotic intraparenchymal nodules. Anthracosis is accumulation of carbon particles in lungs, typically seen in coal miners but also in many city dwellers exposed daily to polluted air. Asbestosis is caused by chronic exposure to asbestos in industrial settings such as in ship-building. Progressive fibrosis is a form of coal worker's pneumoconiosis. Sarcoidosis is a granulomatous disease of unknown etiology unrelated to inhalation of dust particles.
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