Mesothelioma - A Rare Asbestos Disease Mesothelioma is a cancer that develops in the linings of various organs. It can begin in the lung (pleural mesothelioma) or in the stomach lining (peritoneal mesothelioma). Asbestos exposure is the primary risk factor for mesothelioma. After exposure, symptoms can take years to appear. https://vimeo.com/704909181