Causes

About 70 to 80 percent of malignant mesothelioma cases are highly associated with asbestos exposure. The number of months or years exposed and the nature of work are both important factors. Workers who were exposed to high concentrations of asbestos in the shipyards and in the manufacture of construction products such as insulation for the home or office were at particularly high risk. Miners, millers, and workers of heating, plumbing and other construction trades who came in contact with asbestos have also exposed their spouses and children to the asbestos fibers from their hair and clothing.

Genetic factors probably contribute to the risk of mesothelioma, because some workers who were only exposed to asbestos for a brief period later developed the disease. Conversely, some workers who were exposed to high levels for a long period of time never developed malignant mesothelioma.

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