Abstract
A total of 40 cases of multiple pleural plaques is now analysed. The incidence is given of predominantly calcified, and predominantly non-calcified plaques. In addition to the faint shadow sign of the non-calcified plaque, the importance of the profile opacity is stressed. This may be the only sign in some cases. The concept of classical asbestosis is regarded with misgivings, and a re-interpretation is suggested of the ground-glass appearance. The scope and limitations of radiology in lesions due to asbestos inhalation are discussed. Associated neoplasms are illustrated.

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