PMC7878549_01
Initial brain MRI. Diffusion-weighted imaging shows multiple scattered high signal intensity on the right insular, frontal, parietal, and left occipital cortices, suggestive of acute ischemic stroke (A-C).
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F1
Brain magnetic resonance imaging (MRI) revealed multiple scattered acute infarctions in the right insular, frontal, parietal, and left occipital cortices (Figure 1 and Supplementary Figure 1).
Follow-up brain MRI. Partial diffusion restriction on the right frontotemporal and the left occipital cortices (A-C) without decline of apparent diffusion coefficient values on the corresponding lesions (D-F) and hypointensities on T1-weighted images (G-I) and hyperintensities on T2-weighted images (J-L), correlating with previously infarcted tissue (white arrows) with perilesional edema, which represents brain metastasis.
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F2
The MRI scan demonstrated partial diffusion restriction on right frontotemporal and left occipital cortices without decline of apparent diffusion coefficient values on the corresponding lesions and T1 hypointensities and T2 hyperintensities with perilesional vasogenic edema on the right insular, frontal, parietal, and left occipital cortices, indicative of brain metastasis confined to the area of previous infarctions (Figure 2).