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Related Experiment Videos

Pemphigus and myasthenia gravis

J C Maize, R L Dobson, T T Provost

    Archives of Dermatology
    |October 1, 1975
    PubMed
    Summary

    True pemphigus and myasthenia gravis frequently co-occur. This case suggests a potential failure in thymic-dependent lymphocyte regulation may underlie the autoimmune response in these concurrent conditions.

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    Area of Science:

    • Immunology
    • Neurology
    • Dermatology

    Background:

    • True pemphigus and myasthenia gravis are autoimmune disorders.
    • A higher than chance co-occurrence of these conditions has been observed.
    • The role of the thymus in both diseases is a subject of ongoing research.

    Observation:

    • A 57-year-old woman with myasthenia gravis in remission developed pemphigus foliaceus.
    • No thymoma was detected via imaging.
    • Antinuclear antibodies interfered with pemphigus antibody testing.

    Findings:

    • Indirect immunofluorescence showed no cross-reactivity between pemphigus antibodies and thymic components.
    • This contrasts with findings in myasthenia gravis where antibodies can target thymic myoid cells.
    • The study highlights diagnostic challenges due to interfering antibodies.

    Implications:

    • The co-occurrence of pemphigus and myasthenia gravis may stem from dysregulation of thymic-dependent lymphocytes.
    • This suggests a shared or related autoimmune mechanism.
    • Further research is needed to elucidate the precise immunological links between these diseases.

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