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Similarities and differences of MR findings between Japanese encephalitis and Wilson's disease

Manash Saha1, Sunil Kumar, Ashish Das

  • 1Department of Radiodiagnosis, Sanjay Gandhi Post-Graduate Institute of Medical Sciences, Raebareli Road, Lucknow 226014, India.

European Radiology
|April 18, 2002
PubMed

Insights

Magnetic Resonance (MR) imaging can differentiate Japanese Encephalitis (JE) from Wilson's disease (WD) despite similar lesion patterns. Key differences in brain stem, thalamic, and basal ganglia involvement aid in diagnosis.

Area of Science:

  • Neurology
  • Radiology
  • Medical Imaging

Background:

  • Japanese Encephalitis (JE) and Wilson's disease (WD) are distinct neurological conditions.
  • Both JE and WD can present with overlapping findings on Magnetic Resonance (MR) imaging, posing diagnostic challenges.

Purpose of the Study:

  • To identify similarities and differences in MR imaging findings between JE and WD.
  • To establish characteristic MR imaging criteria for differentiating JE from WD.

Main Methods:

  • Retrospective study of 25 confirmed JE cases and 10 confirmed WD cases.
  • Utilized Spin Echo (SE) T1- and T2-weighted imaging on a 1.5-T MR system.
  • Included T1-weighted magnetization transfer (MT) SE sequences in a subset of patients before and after contrast administration.

Main Results:

  • Both conditions showed predominant basal ganglia and thalamic involvement.
  • WD cases more frequently exhibited brain stem lesions, with spared posteromedial thalami.
  • JE cases showed hyperintense basal ganglia on T2-weighted images, thalamic hemorrhage, and meningeal enhancement; WD showed mixed basal ganglia intensity and peripheral putaminal rim enhancement.

Conclusions:

  • Distinct MR imaging features can help differentiate JE from WD.
  • Characteristic lesion patterns, including brain stem, thalamic, and basal ganglia appearances, are crucial for diagnosis.

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