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Anti-GQ1b Antibody Syndrome Presenting with Severe Headache
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Seo-Young Choi, Kyeung-Hae Kim, Jong Kuk Kim, Nam Jun Kim, Young Hee Kim, Kwang-Dong Choi
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Res Vestib Sci. 2020;19(4):141-143. Published online December 15, 2020
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DOI: https://doi.org/10.21790/rvs.2020.19.4.141
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 Abstract
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- Anti-GQ1b antibody syndrome, including Miller Fisher syndrome, Guillain-Barré syndrome with ophthalmoplegia, Bickerstaff’s brainstem encephalitis, and acute ophthalmoplegia without ataxia, has overlapped clinical symptoms and mostly associated with anti-GQ1b immunoglobulin (Ig) G antibody. We report two cases of anti-GQ1b antibody syndrome mainly presenting with a severe headache. The 60-year-old man was admitted for severe headache and gait disturbance. Neurological examination revealed limb and truncal ataxia, areflexia, nystagmus, and ophthalmoplegia. Serum IgG anti-GQ1b antibody was positive. He recovered after intravenous (IV) immunoglobulin and steroid. The 23-year-old man suffered from severe headache (visual analogue scale=10) within the periorbital area. Ophthalmoplegia with gaze-evoked nystagmus were revealed. Serum IgG anti-GQ1b and anti-GT1a antibodies were positive. Headache was improved by IV immunoglobulin and steroid. The pathophysiology of headache in anti-GQ1b antibody syndrome is largely unknown. The affected nerve or structures in the brainstem including the trigeminovascular system may induce intractable severe headache.
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