A 57-year-old presents with cough, sputum production, dyspnea, and decreased lung volume and is diagnosed with pneumoconiosis. When taking the patient's history, which finding is the most probable cause of the illness?
a. Inhalation of silica
b. Autoimmune disease
c. Allergic reactions
d. Flail chest
ANS: A
The dusts of silica, asbestos, and coal are the most common causes of pneumoconiosis.
Pneumoconiosis is neither an autoimmune nor an allergic disorder; it is not due to flail chest.
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