Pleural Mesothelioma and Non Asbestos Mesothelioma The majority of pleural mesothelioma cases are result of asbestos exposure, according to research. Certain patients, however, do not have any known risk factors. Mesothelioma is a cancer of the lining of the lungs (pleura) and stomach (peritoneal mesothelioma) and the heart. Symptoms typically
