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High-dose methotrexate-associated acute renal failure may be an avoidable complication.
Cheuk-Ming Fong1, Anselm C W Lee
1Department of Paediatrics and Adolescent Medicine, Tuen Mun Hospital, New Territories, Hong Kong, China.
Pediatric Hematology and Oncology
|December 6, 2005
Summary
High-dose methotrexate can cause kidney failure in children with acute lymphoblastic leukemia. Prior exposure to contrast agents like iopamidol may increase this risk, highlighting the importance of careful patient monitoring.
Area of Science:
- Pediatric Oncology
- Nephrology
- Pharmacology
Background:
- Acute lymphoblastic leukemia (ALL) treatment often involves high-dose methotrexate.
- High-dose methotrexate can lead to nephrotoxicity, a serious complication.
- Understanding risk factors for methotrexate-associated nephropathy is crucial for patient safety.
Observation:
- A 17-year-old boy with ALL developed acute renal failure within 48 hours of high-dose methotrexate infusion.
- The patient had received intravenous iopamidol, a contrast medium, the day before methotrexate treatment.
- Renal function normalized after 14 days with supportive care, folinic acid rescue, and urinary alkalinization.
Findings:
- This case suggests a potential link between prior exposure to intravenous contrast media and the development of methotrexate-associated nephropathy.
- Methotrexate-associated nephropathy is a rare but significant complication in pediatric oncology.
- Nephrotoxic agents may be an underrecognized risk factor for methotrexate-induced kidney injury.
Implications:
- Clinicians should consider the potential for additive nephrotoxicity when administering high-dose methotrexate to patients exposed to other nephrotoxic agents, including contrast media.
- Enhanced vigilance and proactive management strategies are warranted in pediatric oncology patients receiving methotrexate.
- Further research into the interaction between contrast media and methotrexate is needed to elucidate the underlying mechanisms and refine clinical guidelines.