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Muscle Nerve. 2014 May;49(5):629-35. doi: 10.1002/mus.24192. Epub 2014 Feb 28.

Acute and chronic ataxic neuropathies with disialosyl antibodies: a continuous clinical spectrum and a common pathophysiological mechanism.

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Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Unit 09-01, 14 Medical Drive, 117599, Singapore.


Acute ataxic neuropathies with disialosyl antibodies include Fisher syndrome, ataxic Guillain-Barré syndrome (GBS), and acute sensory ataxic neuropathy. Fisher syndrome and ataxic GBS are more strongly associated with IgG anti-GQ1b and anti-GT1a than with anti-GD1b antibodies, whereas the association is reversed in the case of acute sensory ataxic neuropathy. Chronic ataxic neuropathy with disialosyl antibodies is associated with IgM paraprotein to GD1b and GQ1b, which occasionally reacts with GT1a. The clinical, electrophysiological, and pathological features, along with experimental findings, suggest that acute and chronic ataxic neuropathies with disialosyl antibodies form a continuous clinical and pathophysiological spectrum characterized by a complement-mediated disruption at the nodal region and are better classified in the new category of nodo-paranodopathies.


Fisher syndrome; Guillain-Barré syndrome; anti-GD1b antibody; anti-GQ1b antibody; ataxic neuropathy

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