Presentation
Headache, fever, seizures, rapid deteriation.
Patient Data
Age: 40 years
Gender: Male
From the case:
West Nile virus encephalitis
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Cortical thickening and T2 hyperintensity of the left mesial temporal lobe (best appreciated on saggital view).
No sign of restricted diffusion.
No clear contrast enhancement.
Case Discussion
The imaging differential diagnosis includes the following: viral encephalitis, low-grade tumor, focal cortical dysplasia and limbic encephalitis.
Taking into consideration the symptoms, especially rapid clinical determination, the diagnosis of viral encephalitis is favored.
The patient underwent a lumbar puncture with PCR.
CSF PCR for West Nile virus: positive.
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