Mesothelioma Mesothelioma is a form of cancer, occurs in the organ linings. It is most commonly found in the lung (pleura) but it can also affect the abdominal lining (peritoneum), heart or testicles. Exposure to asbestos fibres can be the cause mesothelioma. Typically, symptoms don't appear until decades after exposure. https://vimeo.com/704914898