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  • Title: Symptom outcome after craniovertebral decompression for Chiari type 1 malformation without syringomyelia.
    Author: Pepper J, Elhabal A, Tsermoulas G, Flint G.
    Journal: Acta Neurochir (Wien); 2021 Jan; 163(1):239-244. PubMed ID: 33130986.
    Abstract:
    BACKGROUND: Specific symptom outcomes after craniovertebral decompression for patients with Chiari type 1 malformation, without accompanying syringomyelia, are not well characterised and poorly reported. METHODS: We performed a retrospective review of all patients diagnosed with Chiari type 1, without syringomyelia, who underwent craniovertebral decompression in our unit. RESULTS: We identified 129 individuals with a minimum of 2 years' follow-up. The most common pre-operative symptoms were pressure dissociation headaches (78%), visual disturbances (33%), dizziness/balance disturbances (24%) and blackouts (17%). The symptoms most likely to respond to surgery included Valsalva-induced headache (74% response, p < 0.0001) and blackouts (86% response, p < 0.001). CONCLUSIONS: After successful craniovertebral decompression, most patients presenting with pressure dissociation headaches and blackouts will improve. However, the large variety of other symptoms patients often present with may not improve after surgery.
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