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Fig 4. Patient 5. Twenty-nine-year-old man.
A, Coronal T2-weighted image shows bilateral hippocampal body involvement (black arrows). Note bilateral thalamic and substantia nigra involvement (white arrows).
B, Axial T2-weighted image shows bilateral hippocampal tail involvement (arrows).
C, Axial CT scan done at the same time as A and B shows hypoattenuated left mesial temporal lobe lesion. Note resemblance to Herpes simplex virus encephalitis. The right-sided involvement is not seen. The thalamic and substantia nigra lesions are not visible (not shown in the figure).
D and E, Follow-up axial and coronal T2-weighted MR done 2.5 months after A and B shows clearing up of the lesions in thalamus, substantia nigra, and hippocampus.
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