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: Ch-ch-ch-changesNext Next post: Veterans Comprise the Largest group of Mesothelioma Victims