Presentation
The patient came with a history of neck pain for a long time.
Patient Data
Age: 18 years
Gender: Female
From the case:
Chiari 1.5 malformation
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Overcrowding of posterior cranial fossa, tonsillar herniation, caudal displacement of the medulla and posterior angulation of the odontoid process.
No hydrocephalus or syringohydromyelia.
Case Discussion
The Chiari 1.5 malformation is defined as a tonsillar herniation within a Chiari I malformation with additional caudal descent of the brain stem through the foramen magnum which is not evident in isolated Chiari type I.