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Isolated temporal lobe involvement in Japanese encephalitis.
1Department of Diagnostic Imaging, National University Hospital, Singapore. suat_jin_lu@hotmail.com
Summary
Japanese encephalitis (JE) rarely affects the temporal lobe, making it hard to distinguish from Herpes simplex encephalitis (HSE). Doctors should consider both in acute encephalitis cases with temporal lobe imaging findings, especially in JE-endemic regions.
Area of Science:
- Neurology
- Infectious Diseases
- Neuroimaging
Background:
- Japanese encephalitis (JE) is a mosquito-borne viral illness endemic in Asia.
- Neuroimaging findings in JE typically involve the thalamus, basal ganglia, and brainstem.
- Temporal lobe involvement is an exceptionally rare presentation of JE.
Observation:
- This study focuses on the rare occurrence of isolated temporal lobe involvement in Japanese encephalitis.
- Distinguishing JE from Herpes simplex encephalitis (HSE) can be challenging when temporal lobes are exclusively affected.
- Clinical presentation includes acute encephalitis with specific radiological evidence.
Findings:
- Isolated temporal lobe involvement on neuroimaging is exceedingly uncommon in JE.
- The differential diagnosis for acute encephalitis with temporal lobe lesions must include both JE and HSE.
- Radiological evidence of temporal lobe involvement necessitates consideration of both viral etiologies.
Implications:
- Early and accurate diagnosis is crucial for appropriate patient management and treatment.
- Considering JE in HSE-like presentations can prevent delayed diagnosis and treatment in endemic areas.
- This highlights the importance of considering less common presentations of JE in clinical practice.
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