Mesothelioma and Asbestosis Two lung diseases are connected to asbestos fiber exposure: mesothelioma, and asbestosis. Mesothelioma, a cancerous disease is caused by asbestos fibers. Asbestosis is a non-cancerous lung disease that can cause scarring. Both diseases have similar symptoms, like breathlessness. Doctors diagnose mesothelioma by testing, such as a biopsy. https://vimeo.com/704976259