Mesothelioma Mesothelioma is a type of cancer, occurs in the linings of organs. It usually affects the lung (pleura) but it can also affect the lining of the abdomen (peritoneum), heart or testicles. Mesothelioma can be caused by asbestos fibre exposure. Typically, symptoms don't appear until decades after exposure. Signs https://vimeo.com/704912465