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Related Experiment Videos

Hyperxanthinemia interferes with serum uric acid determinations by the uricase method.

K R Hande, F Perini, G Putterman

    Clinical Chemistry
    |August 1, 1979
    PubMed
    Summary

    Rapid tumor lysis in patients treated with allopurinol can cause high xanthine levels, masking high uric acid levels when using the uricase method. Alternative measurement methods are recommended for accurate uric acid assessment.

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    Area of Science:

    • Oncology
    • Biochemistry
    • Pharmacology

    Background:

    • Allopurinol is a common treatment for hyperuricemia and certain cancers like Burkitt's lymphoma.
    • Tumor lysis syndrome can occur during cancer treatment, leading to rapid cell breakdown.

    Observation:

    • A patient with Burkitt's lymphoma on allopurinol treatment exhibited significantly elevated serum xanthine levels (up to 148 mg/L).
    • These high xanthine levels resulted in falsely low serum uric acid readings when analyzed using the standard uricase method.

    Findings:

    • Rapid tumor lysis in patients receiving allopurinol can lead to marked hyperxanthinemia.
    • Hyperxanthinemia can interfere with uricase-based uric acid assays, obscuring potential hyperuricemia.

    Implications:

    Related Experiment Videos

    • Clinicians should be aware of potential interference in uric acid measurements in patients undergoing rapid tumor lysis while on allopurinol.
    • The phosphotungstate colorimetric assay is a recommended alternative for accurate uric acid measurement in such cases.
    • Accurate monitoring of uric acid is crucial for managing patients with conditions like Burkitt's lymphoma and tumor lysis syndrome.