Pneumoconiosis (1936)

The text supplied with this citation does not appear to be the cited item. Instead of a piece by F. Lang, it is a committee report signed by R. R. Sayers as chairman and seven other members, reprinted in a Year Book. It did not study patients or workers. The committee proposed standard terms for describing chest X-ray appearances of silicosis, the lung disease caused by inhaling dust with a high silica content, alongside the matching tissue changes. Asbestosis was expressly excluded because its pathology differs. The tabulation had three groups: healthy lungs, simple silicosis, and silicosis with infection, usually tuberculosis. Increased linear markings and root shadows were placed in the healthy group as not diagnostic, because the committee held that silicosis begins only when the lung tissue itself is affected. Simple silicosis was described as discrete nodules up to 6 mm across. The committee said that telling the fused shadows of advanced silicosis from infected masses is difficult and not always possible. It hoped the terms would receive a practical test.

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From J-M's medical library

This copy comes from the Johns-Manville medical library. J-M listed it in its medical library index as no. 005276.