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Chiari Malformations DRAFT

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Overview

Chiari malformations describe abnormalities in the hindbrain, where the contents of the posterior fossa are herniating downwards into the foramen magnum. There are several types, with type 1 being the most common. they can be associated with a spinal syrinx. the symptoms are a consequence of disturbed CSF flow around the craniocervical junction.

Typical symptoms include pressure headaches that are exacerbated by valsalva manoeuvres, visual disturbances, dizziness and nausea. Symptoms associated with a cervical syrinx are similar to those of cervical myelopathy.

There is a separate entity called benign cerebellar ectopia, which is often reported on CT imaging. This is not a chiari 1 malformation and is an incidental finding.

Patients with a chiari malformation should be referred to the MSK spinal interface service

 

 



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