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Mesothelioma is an uncommon malignancy caused primarily by exposure to asbestos. Millions of people in the United States alone have been exposed to asbestos and are in danger of developing malignant mesothelioma. The number of patients diagnosed with mesothelioma is expected to continue to rise until 2020. In undeveloped countries where the use of asbestos has not been banned, the rate of asbestos-related disease will climb higher and for much longer.

Only 2,000 to 3,000 new diagnoses of malignant mesothelioma cancer crop up each year in the U.S., making it an uncommon type of cancer. Causes point to asbestos exposure in the past and the cancer can take anywhere from 20 to 40 years to show up.