Mesothelioma Mesothelioma is a type of cancer that develops in the linings that surround organs. It most often affects the lungs (pleura) but it can also affect the lining of the abdomen (peritoneum), heart or the testicles. Mesothelioma can be caused by asbestos fibre exposure. Typically, symptoms don't appear until https://vimeo.com/704981654