Mesothelioma - A Rare Asbestos Disease Mesothelioma is a tumor that occurs in the tissues and linings of certain organs. It can start in the lungs (pleural mesothelioma) or the stomach liner (peritoneal mesothelioma). Exposure to asbestos is a major risk factor for mesothelioma. It can take decades for symptoms https://vimeo.com/704717812