Intrathecal methotrexate.
D002648:Child; D002675:Child, Preschool; D006801:Humans; D007278:Injections, Spinal / Q000009:adverse effects; D007938:Leukemia / Q000188:drug therapy; D008297:Male; D008727:Methotrexate / Q000008:administration & dosage* / Q000009:adverse effects; D010243:Paralysis / Q000139:chemically induced*
D008727:Methotrexate