Visual impairment in anti-GQ1b positive Miller Fisher syndrome

Autoimmune neuropathies such as the Guillain-Barre syndrome (GBS), the Mill er Fisher syndrome (MFS), and chronic inflammatory demyelinating neuropathy (CIDP) have conventionally been considered diseases exclusively of the per ipheral nervous system. In the last decades, however, several reports of CN S involvement in peripheral neuropathy have challenged this view. We descri be a patient with anti-GQ1b positive MFS who - apart From the classical fea tures - also presented with reversible loss of visual acuity suggesting CNS involvement.