Mesothelioma is a rare cancer that forms in the lining of the lungs or abdomen, caused by exposure to asbestos fibers. Survival rates for malignant mesothelioma are generally low, and the median life expectancy is about 12-21 months. So what causes mesothelioma? How many types of mesothelioma are there? What are the manifestations of mesothelioma? Find out more information in the article below.