Herpes encephalitis

Case contributed by Amro Omar


Lethargy, apnea, poor feeding and seizures.

Patient Data

Age: 1 year
Gender: Female

Initial study


There is bilateral asymmetric increased signal intensity in FLAIR sequence with corresponding diffusion restriction on DWI in anterior and medial temporal lobes, limbic systems, right insular cortex and fornix, right pulvinar. Basal ganglia are spared. Increased signal also noted in anterior commissure.

Overall pattern of abnormality is bilateral, and not fitting a single vascular distribution.

Follow-up, one month later


Dramatic change in one month with cystic encephalomalacia, focal atrophy and diffuse white matter hyperintensity.

Case Discussion

This case was managed as herpes simplex encephalitis

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