Chiari 1.5 malformation
The patient came with a history of neck pain for a long time.
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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.
1 case question available
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.
- Malik A, Chandra R, Misra R, Thukral BB. Chiari 1.5: A lesser known entity. Ann Indian Acad Neurol. 2015;18(4):449–450. doi:10.4103/0972-2327.165485