Severe anti-GFAP meningo-encephalomyelitis following viral infection.

Glial fibrillary acidic protein is a recently identified rare cause of autoimmune encephalomyelitis, in which the cerebrospinal fluid shows lymphocytic pleocytosis accompanied by linear perivascular radial gadolinium enhancement in the brain. We report a 19-year-old man admitted to the intensive care unit with suspected viral meningoencephalitis. Magnetic resonance imaging showed mild encephalopathy with a reversible splenial lesion. He quickly developed a coma and acute respiratory failure. Glial fibrillary acidic protein antibodies and human parainfluenza virus were detected by cerebrospinal fluid exams. He was treated with intravenous immunoglobulin, methylprednisolone pulses, plasma exchange and then six infusions of cyclophosphamide plus two of rituximab, which resulted in a total recovery.