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central nervous system prophylaxis (SEN-trul NER-vus SIS-tem PROH-fih-LAK-sis)
|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 sanctuary therapy, CNS prophylaxis, and CNS sanctuary therapy.|