central nervous system sanctuary therapy
(SEN-trul NER-vus SIS-tem SANK-choo-WAYR-ee THAYR-uh-pee)
Chemotherapy or radiation therapy given to the central nervous system (CNS) as a preventive treatment. It kills cancer cells that may be in the brain and spinal cord, even though no cancer has been detected there. Also called central nervous system prophylaxis, CNS prophylaxis, and CNS sanctuary therapy.