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Magnetic resonance and positron emission tomography changes during the clinical progression of Rasmussen encephalitis

K Kaiboriboon1, C Cortese, R E Hogan

  • 1Department of Neurology, Saint Louis University, MO 63110-0250, USA.

Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging
|May 9, 2000
PubMed

Insights

Serial imaging in Rasmussen Encephalitis (RE) reveals delayed structural and functional changes. Positron emission tomography (PET) detected subcortical involvement earlier than magnetic resonance imaging (MRI).

Area of Science:

  • Neurology
  • Neuroimaging
  • Pathology

Background:

  • Rasmussen Encephalitis (RE) is a rare, chronic inflammatory neurological disease affecting one cerebral hemisphere.
  • Early diagnosis is crucial for management, but definitive imaging findings can be delayed.

Observation:

  • This study details serial positron emission tomography (PET) and magnetic resonance imaging (MRI) in a pathologically confirmed RE case.
  • Initial PET and MRI scans were normal, with changes appearing 3 years post-symptom onset.
  • PET showed involvement of the precentral/postcentral gyri and putamen, while MRI revealed precentral/postcentral gyri involvement.

Findings:

  • PET demonstrated earlier subcortical involvement compared to MRI.
  • Image coregistration confirmed good correlation for cortical changes (precentral/postcentral gyri).
  • Significant imaging abnormalities were not evident until 3 years after symptom onset despite early pathological confirmation.

Implications:

  • Findings highlight the variability in PET and MRI presentation for Rasmussen Encephalitis.
  • Emphasizes the importance of integrating electrophysiologic and clinical data for accurate RE diagnosis.
  • Suggests PET may offer earlier detection of subcortical changes in RE than MRI.

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