Abstract:BackgroundThe use of intrathecal (IT) methotrexate (MTX) in combination with systemic high dose MTX (HDMTX) is an established procedure for CNS prophylaxis in patients with acute lymphoblastic leukaemia (ALL), but the evidence for the necessity of this combination is not conclusive. An MTX concentration of 1 μM is assumed to be the lowest concentration for an antileukaemic effect.PurposeTo determine the rate of sufficient CSF MTX concentrations (1 μM) in paediatric patients with ALL who received HDMTX, to eval… Show more
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