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Published on: September 19, 2013

Central nervous system (CNS) prophylaxis in children with low risk acute lymphoblastic leukemia (ALL)

P Littman, P Coccia, W A Bleyer

    International Journal of Radiation Oncology, Biology, Physics
    |October 1, 1987
    PubMed

    Insights

    Cranial radiation can be replaced with maintenance intrathecal methotrexate (IT MTX) in treating low-risk acute lymphocytic leukemia (ALL) in children. This reduces treatment toxicity without compromising patient outcomes.

    Area of Science:

    • Pediatric Oncology
    • Hematology
    • Clinical Trials

    Background:

    • Acute lymphocytic leukemia (ALL) is the most common childhood cancer.
    • Central nervous system (CNS) prophylaxis is crucial in ALL treatment to prevent relapse.
    • Cranial radiation has been a standard CNS prophylaxis but carries long-term toxicity risks.

    Purpose of the Study:

    • To compare the efficacy and safety of two CNS prophylaxis regimens in low-risk pediatric ALL.
    • To determine if intrathecal methotrexate (IT MTX) alone can replace cranial radiation for CNS prophylaxis.

    Main Methods:

    • A randomized controlled trial involving 504 children (age 3-6 years) with newly diagnosed, low-risk ALL.
    • Group 1: Cranial radiation plus IT MTX (250 patients).
    • Group 2: IT MTX only (254 patients).
    • Median follow-up of 54 months.

    Main Results:

    • No significant differences in central nervous system relapse, marrow relapse, disease-free survival, or overall survival between the two groups.
    • Both regimens demonstrated comparable efficacy in preventing leukemia recurrence.

    Conclusions:

    • Maintenance IT MTX is a viable and effective alternative to cranial radiation for CNS prophylaxis in low-risk pediatric ALL.
    • This finding supports reducing or eliminating cranial radiation to mitigate treatment-related toxicities in this patient population.

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