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Related Experiment Videos

Keyhole aqueduct syndrome.

S M de la Monte, S A Horowitz, A A Larocque

    Archives of Neurology
    |September 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Rare communicating brain stem syringes, termed "keyhole aqueduct syndrome," present with cerebellar and brain-stem dysfunction. Autopsy revealed unique keyhole-shaped syrinxes in the midbrain and pons.

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    Area of Science:

    • Neurology
    • Neuroscience
    • Pathology

    Background:

    • Communicating syringes within the brain stem are exceptionally uncommon.
    • The study describes two cases with initial symptoms suggesting multiple sclerosis.

    Observation:

    • Patients presented with cerebellar dysfunction, progressing to brain-stem signs including dysarthria, nystagmus, deafness, and internuclear ophthalmoplegia.
    • Clinical diagnosis was multiple sclerosis, but autopsy revealed distinct neuropathology.

    Findings:

    • Autopsies showed a unique keyhole-shaped syrinx in the midbrain and upper pons, communicating with the aqueduct and fourth ventricle.
    • No associated syringomyelia was present; however, marked cerebellar atrophy and gliosis were observed.
    • One case demonstrated syrinx extension into cerebellar folia.

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    Implications:

    • This distinct neuropathological entity, termed "keyhole aqueduct syndrome," expands the differential diagnosis for brain stem and cerebellar disorders.
    • Highlights the importance of considering rare structural lesions in the differential diagnosis of neurological conditions mimicking multiple sclerosis.