Mesothelioma Mesothelioma is a type of cancer that forms in the linings that surround organs. It usually affects the lungs (pleura) but it can also affect the abdomen's lining (peritoneum) as well as the heart or the testicles. Exposure to asbestos fibres is the cause mesothelioma. Typically, symptoms don't appear https://vimeo.com/703530031