Although it is possible that an individual patient may have both asbestosis and silicosis or mixed dust pneumoconiosis
, it is the authors' collective experience that this is distinctly unusual.
Known pneumoconioses include coal workers' pneumoconiosis (CWP), silicosis, asbestosis, mixed dust pneumoconiosis
, graphitosis, and talcosis.
The cases were diagnosed pathologically as silicosis (142 cases) or mixed dust pneumoconiosis
(91 cases); the diffuse interstitial fibrosis was predominantly in the lower lobes and thickening and adhesion of the pleura covering the DIF was seen in 40.