Supplementary Material for: Seronegative autoimmune encephalomyelitis with area postrema symptoms

A patient who presented with an encephalopathy, then subsequently developed hiccoughs and extensive myelitis is described. MRI demonstrated an extensive spinal cord and area postrema involvement, and inflammatory CSF, but CSF testing for aquaporin-4 (AQP4), myelin oligodendrocyte glycoprotein (MOG), and glial fibrillary acidic protein antibodies (GFAP) was negative. GFAP encephalitis is considered to be an astrocytopathy; we hypothesis involvement of other glial cells especially tanycytes