Mesothelioma - A Rare Asbestos Disease Mesothelioma is a tumor that develops in the linings and tissues of certain organs. It can begin in the lung (pleural mesothelioma) or in the stomach the lining (peritoneal mesothelioma). The exposure to asbestos is one of the main risk factors for mesothelioma. After https://vimeo.com/703521947