Acute disseminated encephalomyelitis is an immune-mediated inflammatory demyelinating disorder of the central nervous system. The first-line treatment is usually high-dose intravenous methylprednisolone. Intravenous immunoglobulin and plasmapheresis have also shown to be beneficial. Immunosuppressive agents like cyclophosphamide have been used in adults with fulminant acute disseminated encephalomyelitis. We report a case of a 3-year-old boy with fulminant acute disseminated encephalomyelitis. Minimal improvement was seen with high-dose intravenous methylprednisolone, intravenous immunoglobulin, and plasmapheresis. Based on the reports of cyclophosphamide being used successfully to treat adult patients with fulminant acute disseminated encephalomyelitis, we used it in our patient who then showed dramatic and quick improvement. We suggest that if conventional treatment fails, cyclophosphamide could be tried in pediatric patients with fulminant acute disseminated encephalomyelitis.
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