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Chiari type I malformation presenting as hemifacial spasm: case report.
Mustafa Efkan Colpan1, Zeki Sekerci
1Department of Neurosurgery, Social Security Ankara Education and Research Hospital, Ankara, Turkey. colpan@iit.edu
Neurosurgery
|August 12, 2005
Summary
Chiari I malformation, a hindbrain condition, can rarely cause hemifacial spasm due to nerve compression. Surgical decompression effectively resolved the spasm in a patient, highlighting this crucial diagnostic consideration.
Area of Science:
- Neurology
- Neurosurgery
Background:
- Chiari I malformation involves hindbrain herniation, potentially compressing cranial nerves.
- Hemifacial spasm is typically idiopathic or caused by vascular compression.
Observation:
- An 18-year-old male presented with right hemifacial spasm.
- MRI revealed Chiari I malformation without syringomyelia.
Findings:
- Posterior fossa decompression, C1 laminectomy, and duraplasty were performed.
- The patient's hemifacial spasm resolved completely post-surgery.
Implications:
- Downward displacement in Chiari I malformation can irritate the facial nerve, causing hemifacial spasm.
- Posterior fossa decompression is a viable treatment for Chiari I malformation-associated hemifacial spasm.