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[A 16-year-old boy with meningoencephalitis with auto-antibody against glutamate receptor]

Shiho Tomioka1, Masayuki Shimono, Ayako Kato

  • 1Department of Pediatrics, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka. shihot@dp.u-netsurf.ne.jp

No to Hattatsu = Brain and Development
|January 24, 2008
PubMed

Insights

This study details a 16-year-old with autoimmune meningoencephalitis, characterized by seizures and inflammation. Treatment with methylprednisolone pulse therapy led to significant recovery and negative auto-antibodies against glutamate receptors.

Area of Science:

  • Neurology
  • Immunology
  • Pediatrics

Background:

  • Autoimmune meningoencephalitis can present with diverse neurological symptoms.
  • Glutamate receptor (GluR) antibodies are implicated in certain autoimmune encephalopathies.
  • Distinguishing autoimmune meningoencephalitis from other conditions like Rasmussen's encephalitis is crucial for effective treatment.

Observation:

  • A 16-year-old male presented with fever, generalized convulsions, and electroencephalography (EEG) showing status epilepticus.
  • Cerebrospinal fluid analysis revealed pleocytosis, elevated IgG index, and oligoclonal bands.
  • Brain MRI showed mild high signal intensity in the cerebral gray matter on FLAIR sequences.

Findings:

  • The patient was diagnosed with autoimmune meningoencephalitis based on clinical, CSF, and imaging findings.
  • Treatment with methylprednisolone pulse therapy resulted in substantial clinical improvement and normalization of EEG.
  • Pre-treatment positivity for IgM and IgG auto-antibodies against glutamate receptor (GluR) epsilon 2 and delta 2 became negative post-therapy.

Implications:

  • Autoimmune meningoencephalitis targeting GluR antibodies can manifest with electrical status and mild MRI changes.
  • A positive response to methylprednisolone pulse therapy suggests an autoimmune etiology.
  • These findings differentiate this condition from Rasmussen's encephalitis, aiding in diagnosis and management.

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