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Peripheral nerve involvement in pernicious anaemia.

M Cox-Klazinga, L J Endtz

    Journal of the Neurological Sciences
    |March 1, 1980
    PubMed
    Summary

    Pernicious anemia often causes nerve dysfunction and thiamine deficiency, especially in untreated patients. Hydroxocobalamin therapy significantly reduces these risks, highlighting the importance of vitamin B12 and thiamine in neurological health.

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    Area of Science:

    • Neurology
    • Metabolic Disorders
    • Hematology

    Background:

    • Pernicious anemia is an autoimmune condition leading to vitamin B12 deficiency.
    • Neurological complications are known but their prevalence and association with thiamine metabolism are not fully elucidated.

    Purpose of the Study:

    • To investigate the prevalence of nervous system impairment and altered thiamine metabolism in patients with pernicious anemia.
    • To assess the impact of hydroxocobalamin therapy on these parameters.

    Main Methods:

    • Studied 40 patients with pernicious anemia, divided into untreated (n=20) and hydroxocobalamin-treated (n=20) groups.
    • Assessed peripheral nerve function through nerve conduction velocity measurements.
    • Measured blood thiamine levels and biochemical markers of thiamine deficiency.

    Main Results:

    • 65% of untreated patients exhibited peripheral nerve dysfunction compared to only 5% of treated patients.
    • 80% of untreated patients had reduced blood thiamine levels, with 60% showing biochemical deficiency signs.
    • 30% of treated patients had reduced blood thiamine levels, suggesting potential ongoing metabolic alterations.

    Conclusions:

    • Peripheral nerve involvement in pernicious anemia is more common than previously reported.
    • Thiamine deficiency is frequently observed in pernicious anemia patients and may contribute to neurological impairment.
    • Hydroxocobalamin therapy appears to mitigate nerve dysfunction and may influence thiamine status.

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