Mesothelioma - A Rare Asbestos Disease Mesothelioma is a tumor that occurs in the tissues and linings of certain organs. It can begin in the lung (pleural mesothelioma) or the stomach liner (peritoneal mesothelioma). Asbestos exposure is the most significant risk factor for mesothelioma. After exposure, symptoms can be delayed https://vimeo.com/705024263