Mesothelioma Mesothelioma, a form of cancer, occurs in the organ linings. It most often affects the lung (pleura) but can also affect the abdominal lining (peritoneum) and heart, as well as testicles. Mesothelioma can be caused by asbestos fibre exposure. Typically, symptoms don't appear until decades after exposure. Signs and https://vimeo.com/704995635