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Chiari I malformation

Case contributed by Bita Abbasi
Diagnosis certain

Presentation

MRI done for chronic headache workup.

mri

In the midsagittal MRI, the posterior fossa is small. The so called peg-like cerebellar tonsils are located well below the level of foramen magnum. Tonsilar sulci have the configuration of Sargeant Stripe.  

Syringohydromyelia is also noted in the upper cervical spinal cord.

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