Mesothelioma Mesothelioma is a form of cancer, develops in the linings covering organs. It usually affects the lungs (pleura) but it can also affect the lining of the abdomen (peritoneum) and heart, as well as testicles. Exposure to asbestos fibres is the main cause of mesothelioma. Typically, symptoms don't appear https://vimeo.com/704929811