Mesothelioma Mesothelioma is a type of cancer, develops in the organ linings. It is most commonly found in the lungs (pleura) but can also affect the abdominal lining (peritoneum), heart or testicles. Exposure to asbestos fibres can be the cause of mesothelioma. Typically, symptoms don't appear until decades after exposure. https://vimeo.com/705050706