Presentation of CaseA 68-year-old man was admitted to the hospital because of a pleural effusion.Beginning at the age of 20 years he had worked for three years as a stone cutter in a quarry without respiratory protection, and for the next 12 years he had made sand castings in an iron foundry. Repeated x-ray examinations of the chest were reported to show changes consistent with silicosis, and he had been dyspneic for an uncertain period. Seven years before admission a film of the chest was interpreted as showing tuberculosis; multiple sputum specimens and a scalene-lymph-node biopsy revealed no . . .
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Cabot et al. (1972) studied this question.
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