Mesothelioma and Asbestosis Two lung diseases are connected to exposure to asbestos fibers: mesothelioma, and asbestosis. Mesothelioma is a cancerous illness, is caused by asbestos fibers. Asbestosis is a non-cancerous lung condition that causes scarring. Both diseases have the same symptoms, like breathlessness. Doctors diagnose mesothelioma by testing such as https://vimeo.com/703532122