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Congenital stiff-man syndrome

J E Sander, R B Layzer, A B Goldsobel

    Annals of Neurology
    |August 1, 1980
    PubMed
    Summary

    A dominantly inherited benign disorder causes early infant hypertonia that resolves by age three. Stiffness returns in adolescence, triggered by movement or cold, but remains mild compared to sporadic stiff-man syndrome.

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    Area of Science:

    • Neurology
    • Genetics
    • Pediatrics

    Background:

    • Stiff-man syndrome is a rare autoimmune disorder characterized by muscle rigidity and spasms.
    • Dominantly inherited disorders present unique challenges in genetic counseling and family studies.

    Observation:

    • A large family exhibits a benign, dominantly inherited disorder with features similar to stiff-man syndrome.
    • Affected infants present with marked hypertonia at birth, which typically normalizes by three years of age.

    Findings:

    • Muscle stiffness recurs during adolescence in affected individuals.
    • Symptoms are often exacerbated by external stimuli such as sudden movement or cold exposure.
    • The adolescent-onset stiffness is considerably milder than that observed in sporadic stiff-man syndrome.

    Implications:

    • This finding expands the understanding of the genetic basis of neuromuscular disorders.
    • It suggests a distinct genetic etiology for this benign stiffening disorder, separate from autoimmune causes.
    • Further research can elucidate the specific genes and pathways involved, aiding in diagnosis and management.

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