Presentation
Headache and dizziness.
Patient Data
Age: 50 years
Gender: Female
From the case:
Chiari 1.5 malformation
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Info
Cerebellar tonsillar herniation with caudal herniation of the obex of the medulla oblongata through the foramen magnum.
No evidence of hydrocephalus or syringohydromyelia.
Case Discussion
Chiari 1.5 malformation is a term used in the literature to describe the combination of cerebellar tonsillar herniation (as seen in Chiari I malformation) along with caudal herniation of some portion of the brainstem (often obex of the medulla oblongata) through the foramen magnum. It is considered a progression of Chiari I malformation.
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