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Related Experiment Videos

Hypothyroidism with true myotonia

G S Venables, D Bates, D A Shaw

    Journal of Neurology, Neurosurgery, and Psychiatry
    |November 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

    Subclinical hypothyroidism can cause true myotonia, a condition not typically associated with this thyroid disorder. Thyroid hormone replacement therapy effectively resolved the patient's myotonia symptoms.

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    Area of Science:

    • Endocrinology
    • Neurology

    Background:

    • Subclinical hypothyroidism is characterized by elevated thyroid-stimulating hormone levels with normal circulating thyroid hormone concentrations.
    • Myotonia, the delayed relaxation of muscles, is typically associated with specific genetic muscle channelopathies like myotonia congenita and dystrophia myotonica.

    Observation:

    • A case study describes a patient presenting with true myotonia.
    • The patient had diagnosed subclinical hypothyroidism.
    • There was no family history or clinical evidence of dystrophia myotonica or myotonia congenita.

    Findings:

    • Thyroid hormone replacement therapy with thyroxine was initiated for the patient's subclinical hypothyroidism.
    • The patient experienced a complete resolution of myotonia symptoms following thyroxine treatment.

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    Implications:

    • This case suggests a potential link between subclinical hypothyroidism and the development of myotonia.
    • It highlights the importance of considering thyroid dysfunction in the differential diagnosis of myotonia, even in the absence of overt symptoms.
    • Thyroxine therapy may be an effective treatment for myotonia in patients with underlying subclinical hypothyroidism.