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Related Experiment Videos

Thyroid function in Parkinson disease

J R Berger, R E Kelley

    Neurology
    |January 1, 1981
    PubMed
    Summary

    Hypothyroidism is unexpectedly common in Parkinson disease patients. Early thyroid function screening is recommended, as symptoms can be masked by Parkinsonism, even with L-dopa therapy.

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    Area of Science:

    • Neurology
    • Endocrinology
    • Thyroid Research

    Background:

    • Parkinson disease (PD) is a neurodegenerative disorder.
    • Thyroid dysfunction can present with symptoms overlapping those of PD.
    • The relationship between PD and thyroid function requires further investigation.

    Purpose of the Study:

    • To prospectively assess thyroid function in patients with Parkinson disease.
    • To compare thyroid function between PD patients and a control group with other neurologic diseases.
    • To determine the influence of L-dopa and carbidopa/L-dopa therapy on thyroid function.

    Main Methods:

    • Prospective study design.
    • Inclusion of 46 patients with Parkinson disease.
    • Inclusion of 46 age- and sex-matched controls with other neurologic diseases.
    • Measurement of serum thyroxine (T4) and T3 resin uptake (T3U).

    Main Results:

    • No statistical difference in T4 or T3U between PD patients and controls.
    • No influence of L-dopa or carbidopa/L-dopa therapy duration or dosage on thyroid function tests.
    • Hypothyroidism observed in 3 of 46 PD patients (6.5%), with none in the control group.
    • One case of hyperthyroidism in each group.

    Conclusions:

    • A higher prevalence of hypothyroidism exists in Parkinson disease patients compared to controls.
    • Early thyroid function evaluation is crucial for PD patients.
    • Hypothyroid symptoms may be masked by Parkinson disease symptoms, necessitating screening.

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