Mesothelioma Mesothelioma is a form of cancer that develops in the linings that surround organs. It most often affects the lungs (pleura) but it can also affect the abdomen's lining (peritoneum) and heart, as well as testicles. Exposure to asbestos fibres is the main cause of mesothelioma. Typically, symptoms don't https://vimeo.com/703528178