Mesothelioma Mesothelioma, a form of cancer, develops in the linings of organs. It is usually found in the linings of the lungs, but it can also occur in the abdominal lining, heart and testicles. Mesothelioma is caused by asbestos fibre exposure. Typically, symptoms don't appear until decades after exposure. Symptoms https://vimeo.com/704985740