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Updated: May 30, 2026

Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy
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Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy

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Mycoplasma pneumoniae-related postencephalitic epilepsy in children

Jainn-Jim Lin1, Shao-Hsuan Hsia, Chang-Teng Wu

  • 1Division of Pediatric Neurology, Chang Gung Children's Hospital and Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan.

Epilepsia
|August 16, 2011
PubMed
Abstract

Insights

Postencephalitic epilepsy is a common complication of Mycoplasma pneumoniae encephalitis. Acute phase seizures and initial EEG findings are key indicators for prognosis in children.

Area of Science:

  • Neurology
  • Infectious Diseases
  • Pediatrics

Background:

  • Mycoplasma pneumoniae is a common respiratory pathogen.
  • It has been linked to encephalitis, but its association with postencephalitic epilepsy is underreported.
  • Understanding this link is crucial for pediatric neurological care.

Purpose of the Study:

  • To investigate clinical, electroencephalography (EEG), and neuroradiologic features of Mycoplasma pneumoniae-related encephalitis in children.
  • To identify prognostic factors for postencephalitic epilepsy.
  • To examine the incidence and characteristics of epilepsy following this infection.

Main Methods:

  • Retrospective review of pediatric Mycoplasma pneumoniae encephalitis cases from January 2001 to June 2010.
  • Systematic evaluation of clinical data, EEG, and neuroradiologic findings.
  • Analysis of seizure types, EEG patterns, and long-term epilepsy outcomes.

Main Results:

  • Out of 99 patients with Mycoplasma pneumoniae encephalitis, 47.5% developed postencephalitic epilepsy.
  • Seizures occurred in 53.5% during the acute phase, with focal seizures being most common.
  • Initial EEG commonly showed cortical dysfunction (37.4%) or focal epileptiform discharges (26.4%); 40.4% of epilepsy cases had intractable seizures.

Conclusions:

  • Postencephalitic epilepsy is a significant complication of Mycoplasma pneumoniae encephalitis in children.
  • Seizures during the acute infection phase are a critical prognostic factor.
  • Focal epileptiform discharges on initial EEG also indicate a poorer prognosis for epilepsy development.

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