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Study of endocrine function in myotonic dystrophy.

A Pizzi, S Fusi, G Forti

    Italian Journal of Neurological Sciences
    |December 1, 1985
    PubMed
    Summary
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    Endocrine function was assessed in myotonic dystrophy (MD) patients. While many hormonal functions showed alterations, these changes were not specific to MD or linked to disease severity.

    Area of Science:

    • Endocrinology
    • Neuromuscular Disorders

    Background:

    • Myotonic dystrophy (MD) is a multisystem disorder.
    • Endocrine dysfunction can occur in MD, but its prevalence and characteristics require further investigation.

    Purpose of the Study:

    • To comprehensively evaluate endocrine function in patients with myotonic dystrophy.
    • To determine the specificity and correlation of endocrine alterations with disease severity and duration.

    Main Methods:

    • Assessed growth hormone (GH), prolactin (PRL), gonadotropins (LH, FSH), testosterone, thyroid hormones (T3, T4, FTI, TSH), and cortisol.
    • Utilized stimulation tests including arginine, TRH, GnRH, HCG, and ACTH.
    • Evaluated circadian cortisol rhythm.

    Main Results:

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    • GH levels were normal; arginine stimulation showed no response.
    • PRL levels were elevated in 2 patients; TRH response was abnormal in 3.
    • Reduced LH response observed in 4/7 men; FSH response was low in 1/7 men and 3/4 women.
    • Thyroid hormone levels were mostly normal; one patient had low FTI and T4.
    • Cortisol circadian rhythm was absent in 3/10 patients; ACTH stimulation was blunted in 3/8.

    Conclusions:

    • Endocrine alterations are relatively common in myotonic dystrophy.
    • These endocrine changes are not specific to MD and do not correlate with disease severity or duration.