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Arnold-Chiari malformation (Type I)

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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A Type I Arnold-Chiari malformation is characterised by descent of the cerebellar tonsils into the spinal canal. It may be asymptomatic.

In symptomatic patients, it is associated with:

  • spinal diseases - 50% of cases:
    • syringomyelia
    • hydromyelia

  • cranial disorders - 10% of cases:
    • obstructive hydrocephalus

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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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