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Associated Bony Malformations and Instability in the Chiari I Malformation
Book chapter

Associated Bony Malformations and Instability in the Chiari I Malformation

Arnold H. Menezes
The Chiari Malformations, pp.225-232
Springer International Publishing
06/10/2020
DOI: 10.1007/978-3-030-44862-2_18

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Abstract

The incidence of craniovertebral junction (CVJ) bony abnormalities in Chiari I malformations is between 7% and 11%. However, the incidence of CVJ bony abnormalities having a hindbrain herniation is 33–38%. There are numerous bony abnormalities with Chiari I malformation in whom instability may be present. The commonest symptom is headache, centered in the base of the skull, often described as “heaviness of the head.” Nausea, extreme dizziness, and vasomotor instability are frequently present. This is corrected with stabilization with temporary brace or permanently with decompression and fusion.
Bony malformations Chiari I Craniocervical junction instability Craniovertebral junction instability Headache

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