Mesothelioma Mesothelioma, a form of cancer, is found in the organ linings. It most often affects the lungs (pleura) but can also affect the abdomen's lining (peritoneum) and heart, as well as testicles. Exposure to asbestos fibres is the cause mesothelioma. Typically, symptoms don't appear until decades after exposure. Signs https://vimeo.com/703529879