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Pediatrics

High-Dose Methotrexate Clearance in Pediatric Acute Lymphoblastic Leukemia

Strategic Insights

— 1 min read

Current study results on Oncology - Acute Lymphoblastic Leukemia have been published, highlighting the importance of urine output in methotrexate clearance in pediatric patients. Researchers conducted a retrospective study of 39 patients treated with high-dose methotrexate at Chang Gung Memorial Hospital, finding that higher urine output was associated with faster methotrexate clearance and shorter hospital stays. The study suggests that optimizing supportive care protocols may improve patient outcomes.

Key Takeaways:

  • Higher urine output (H-UO) group showed significantly faster methotrexate clearance (2.0 vs. 4.0 days, P = 0.0035)
  • H-UO group had a lower incidence of delayed clearance (18.2% vs. 70.6%, P = 0.0025) and shorter hospital stays (5.0 vs. 7.0 days, P = 0.019)
  • Diuretic use was higher in the L-UO group, primarily as a reactive measure
  • No significant difference in methotrexate-related major toxicities was observed
  • The study suggests that prospective studies are warranted to optimize supportive care protocols
  • The research was conducted by Tsung-Yen Chang and colleagues from Chang Gung University and Chang Gung Children's Hospital

Statistics:

  • 39 patients were included in the study
  • The H-UO group had a faster methotrexate clearance time (2.0 days) compared to the L-UO group (4.0 days)
  • The H-UO group had a lower incidence of delayed clearance (18.2%) compared to the L-UO group (70.6%)
  • The H-UO group had shorter hospital stays (5.0 days) compared to the L-UO group (7.0 days)
  • Diuretic use was higher in the L-UO group (primarily as a reactive measure)

Sources:

  • "The relationship between urine output and time to methotrexate clearance in pediatric leukemia patients receiving high-dose methotrexate therapy." BMC Cancer, 2025;25(1):1545.
  • NewsRx. New Findings in Acute Lymphoblastic Leukemia Described from Chang Gung University (The relationship between urine output and time to methotrexate clearance in pediatric leukemia patients receiving high-dose methotrexate therapy). Hematology Week. October 20, 2025; p 303.

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