Mesothelioma Mesothelioma Definition: Mesothelioma is a rare and aggressive cancer that affects the lining of the lungs, abdomen, and heart. It is usually caused by exposure to asbestos. Pleural mesothelioma affects the tissue around the lungs and is the most common form of this cancer. It is typically diagnosed in people who inhaled asbestos fibers … Continue reading Mesothelioma