title: Letter: Leukaemia of the central nervous system.
mesh_terms: D000293:Adolescent; D000328:Adult; D002493:Central Nervous System Diseases / Q000188:drug therapy / Q000209:etiology* / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007278:Injections, Spinal; D004915:Leukemia, Erythroblastic, Acute / Q000150:complications*; D007945:Leukemia, Lymphoid / Q000150:complications*; D007948:Leukemia, Monocytic, Acute / Q000150:complications*; D007951:Leukemia, Myeloid / Q000150:complications*; D015470:Leukemia, Myeloid, Acute / Q000150:complications*; D008578:Meninges; D008727:Methotrexate / Q000008:administration & dosage / Q000627:therapeutic use
chemical_list: D008727:Methotrexate