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Figure 1: Serial brain MRI and Histopathology. (a) Admission diffusion-weighted axial image (DWI) shows an acute small infarct in the left thalamus (arrow). (b and c) Admission fluid-attenuated inversion recovery (FLAIR) axial images show small subacute infarcts in the left thalamusand fronto-temporal region (arrows). (d) Follow-up DWI obtained 4 days after admission shows a new infarct in the left putamen (arrow). (e) Follow-up FLAIR obtained 4 days after admission shows a new subacute infarct in the right thalamus (arrow) and evolution of the prior infarct in the left thalamus. (f) Histopathology (hematoxylin-eosin stain) from the right hemisphericleptomeningeal brain biopsy shows a peri-vascular non-caseating granuloma with multinucleated giant cell (arrow) and lymphocytic infiltration

Figure 1: Serial brain MRI and Histopathology. (a) Admission diffusion-weighted axial image (DWI) shows an acute small infarct in the left thalamus (arrow). (b and c) Admission fluid-attenuated inversion recovery (FLAIR) axial images show small subacute infarcts in the left thalamusand fronto-temporal region (arrows). (d) Follow-up DWI obtained 4 days after admission shows a new infarct in the left putamen (arrow). (e) Follow-up FLAIR obtained 4 days after admission shows a new subacute infarct in the right thalamus (arrow) and evolution of the prior infarct in the left thalamus. (f) Histopathology (hematoxylin-eosin stain) from the right hemisphericleptomeningeal brain biopsy shows a peri-vascular non-caseating granuloma with multinucleated giant cell (arrow) and lymphocytic infiltration