Chiari I Malformation
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Posterior Fossa Malformations
Chiari I Malformation
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Summary
Chiari I malformations are a common type of brain malformation in the posterior fossa. It’s characterized by the downward displacement of the cerebellar tonsils, which can block cerebrospinal fluid and cause syringomyelia. Some symptoms of chiari 1 include mild ataxia and headache, though these will usually not present until adulthood.
Key Points
- Chiari I malformation
- Type of posterior fossa malformation
- Chiari I malformations are most common type
- Pathophysiology
- Ectopia (downward displacement) of cerebellar tonsils through foramen magnum
- Associated with syringomyelia
- Presentation
- Manifests in adults
- Mild ataxia
- Headaches
- Type of posterior fossa malformation