We present the unusual case of 16-year-old girl who developed intracta
ble convulsions five days after the onset of a cold. Meningeal signs,
lymphopenia, proteinuria, and lupus anticoagulant were also present. T
reatment with anticonvulsants, antituberculous agents, and adenine ara
binoside were ineffective. The initiation of methylprednisolone pulse
therapy immediately resolved convulsions and fever, The diagnosis, sug
gested by the clinical course and the marked improvement of the mening
oencephalitis by pulse therapy, was an encephalitic form of acute diss
eminated encephalomyelitis. Clinical and laboratory findings indicated
that an immune disorder may have triggered an abnormal response to a
viral infection leading to this patient's neurologic disorder.