Mesothelioma - A Rare Asbestos Disease Mesothelioma is a tumor that is found 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 main risk factor for mesothelioma. It can take decades before symptoms https://vimeo.com/704998841