Mesothelioma Mesothelioma, a form of cancer, is found in the linings covering organs. It is most commonly found in the lung (pleura) but it can also affect the abdomen's 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/703533747