In general, the risk of getting lung cancer increases with the extend of asbestos exposure, in terms of both intensity and duration. The prognosis for person diagnosed with lung cancer is poor. Only about one in twenty survives longer than five years after it is diagnosed. The relationship between asbestos exposure and asbestosis, mesothelioma and lung cancer has been clearly established and is beyond argument. Several other cancers should be noted.
Pleural plaques are areas of scarring of the pleural surfaces.
In general, they are not associated with any functional abnormality and are merely an indicator of asbestos exposure. Occasionally, they can become so widespread that they restrict lung function. These asbestos bodies are not harmful, and like pleural plaques, serve as evidence of asbestos exposure. Asbestos warts are harmless skin growths that occur when asbestos fibres penetrate the skin. All work with asbestos is covered by and must be performed in accordance with the Occupation Health and Safety act.