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MRI and SPECT in influenzal encephalitis
Y Fujii1, M Kuriyama, Y Konishi
1Department of Pediatrics, Fukui Medical School, Japan.
Pediatric Neurology
|March 1, 1992
Summary
Influenzal encephalitis can cause persistent brain lesions, visible on magnetic resonance imaging and iodine-123 single photon emission computed tomography scans. Despite imaging abnormalities, young children may show no long-term neurological deficits.
Area of Science:
- Neurology
- Pediatrics
- Radiology
Background:
- Influenzal encephalitis is a serious neurological complication of influenza infection in children.
- Early diagnosis and monitoring are crucial for managing pediatric encephalitis.
- Magnetic resonance imaging (MRI) and single photon emission computed tomography (SPECT) are key neuroimaging modalities.
Observation:
- A 22-month-old boy diagnosed with influenzal encephalitis underwent serial MRI and SPECT brain imaging.
- T2-weighted MRI revealed multifocal hyperintense lesions in the cerebral cortex and subcortical white matter.
- Iodine-123 SPECT demonstrated decreased radiotracer uptake in corresponding brain regions.
Findings:
- MRI identified lesions in the left frontal, temporal, parietal, and right frontal lobes.
- SPECT revealed a larger extent of compromised brain regions compared to MRI.
- These imaging abnormalities persisted one year post-encephalitis onset.
Implications:
- SPECT may detect more extensive functional deficits than MRI in influenzal encephalitis.
- Persistent neuroimaging findings do not always correlate with long-term neurological sequelae in children.
- This case highlights the importance of multimodal neuroimaging in assessing pediatric encephalitis.