Nodules in both silicosis and coal workers' pneumoconiosis (CWP) are small, centrilobular and have a predominantly upper lobe distribution. Progressive massive fibrosis may occur in both silicosis and CWP. Heavy exposure to silica can lead to silicoproteinosis. Asbestos-related conditions may be pleural: Pleural plaques Diffuse pleural thickening Benign pleural effusion Mesothelioma Or may be parenchymal: Asbestosis (interstitial fibrosis) Round atelectasis Bronchogenic carcinoma
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Oikonomou et al. (2003) studied this question.
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