Mesothelioma Mesothelioma, a form of cancer, occurs in the linings of organs. It most often affects the lungs (pleura) but can also affect the lining of the abdomen (peritoneum) and heart, as well as testicles. Exposure to asbestos fibres is the main cause mesothelioma. Typically, symptoms don't appear until decades https://vimeo.com/704999153