Mesothelioma is a rare cancer of the protective lining around important organs, such as the lungs. It is caused by asbestos and usually takes 20-50 years to develop after initial exposure.. Types of Mesothelioma Malignant mesothelioma is a cancer of the mesothelium, a thin membrane that protects and lubricates several important organs and body cavities. … Continue reading Mesothelioma