Mesothelioma Mesothelioma, a form of cancer, occurs in the linings of organs. It usually affects the lung (pleura) but can also affect the abdomen's lining (peritoneum), heart or testicles. Exposure to asbestos fibres can be the cause mesothelioma. Typically, symptoms don't appear until decades after exposure. Signs and symptoms Mesothelioma https://vimeo.com/704984519