The treatment for CNS leukaemia is
Intrathecal methotrexate is a chemotherapy drug which is given to prevent leukaemia cells entering the cerebrospinal fluid (CSF) around the spine and brain. This drug is also used to treat leukaemia found in the CSF for CNS leukemias Ref Davidson 23rd edition pg 788
Intrathecal methotrexate
Vincristine and prednisolone
Intrathecal vincristine
IV prednisolone
Haematology