Mesothelioma Mesothelioma is a type of cancer, occurs in the linings of organs. It is most commonly found in the lung (pleura) but it can also affect the abdominal lining (peritoneum), heart or testicles. Mesothelioma is caused by asbestos fibre exposure. Typically, symptoms don't appear until decades after exposure. Signs https://vimeo.com/704933287