PT  - JOURNAL ARTICLE
AU  - Sun-Uk Lee
AU  - Hyo-Jung Kim
AU  - Jeong-Yoon Choi
AU  - Jong Kuk Kim
AU  - Ji-Soo Kim
TI  - Acute vestibular syndrome associated with anti-GQ1b antibody
AID  - 10.1212/WNL.0000000000008107
DP  - 2019 Sep 10
TA  - Neurology
PG  - e1085--e1092
VI  - 93
IP  - 11
4099  - http://n.neurology.org/content/93/11/e1085.short
4100  - http://n.neurology.org/content/93/11/e1085.full
SO  - Neurology2019 Sep 10; 93
AB  - Objectives To delineate the clinical features and ocular motor findings in acute vestibular syndrome (AVS) associated with anti-GQ1b antibodies.Methods We reviewed 90 patients with positive serum anti-GQ1b antibody in association with various neurological syndromes at Seoul National University Bundang Hospital from 2004 to 2018. The diagnoses included typical Miller Fisher syndrome (n = 31), acute ophthalmoplegia without ataxia (n = 27), Guillain-Barre syndrome with ophthalmoplegia (n = 18), AVS (n = 11), and Bickerstaff brainstem encephalitis (n = 3). Of them, the 11 patients with AVS formed the basis of this study. We also conducted a systematic review on AVS reported in association with anti-GQ1b antibody.Results Patients with AVS showed various ocular motor findings that included head-shaking nystagmus (n = 6), spontaneous nystagmus (n = 5), gaze-evoked nystagmus (n = 5), central positional nystagmus (n = 3), canal paresis (n = 2), and abnormal head-impulse tests (n = 1) without any internal or external ophthalmoplegia. Compared to those with other subtypes, patients with AVS mostly showed normal deep tendon reflexes (8 of 11 [73%], p = 0.002) and normal results on nerve conduction studies (4 of 4 [100%], p = 0.010). The clinical and laboratory findings resolved or improved markedly in all patients within 6 months of symptom onset. Systematic review further identified 7 patients with AVS and positive serum anti-GQ1b antibody who showed various ocular motor findings, including gaze-evoked nystagmus, saccadic dysmetria, central positional nystagmus, and ocular flutter or opsoclonus.Conclusion Anti-GQ1b antibody may cause acute vestibulopathy by involving either the central or peripheral vestibular structures. AVS may constitute a subtype of anti-GQ1b antibody syndrome.AO=acute ophthalmoparesis; AVS=acute vestibular syndrome; BBE=Bickerstaff brainstem encephalitis; GBS=Guillain-Barre syndrome; GEN=gaze-evoked nystagmus; HIT=head-impulse tests; HSN=headshaking nystagmus; IgG=immunoglobulin G; IgM=immunoglobulin M; IVIG=IV immunoglobulin; MFS=Miller Fisher syndrome