Veterans Comprise the Largest group of Mesothelioma Victims Mesothelioma is a rare cancer caused by the inhalation or ingestion of asbestos fibers. Mesothelioma is a rare cancer caused by the inhalation or ingestion of asbestos fibers. Post navigation Previous Previous post: Veterans Comprise the Largest group of Mesothelioma VictimsNext Next post: Learning to Live Later Life