PMC9647162_01
Day 84 brain MRI of the first case. New symmetric subcortical FLAIR hyper signal intensity in the subcortical motor cortex (A, Axial FLAIR sequence arrows) and trace SAH in bilateral cerebral hemispheres (B, and C Axial SWI sequence, arrows). Day 116 follow-up brain MRI demonstrates interval resolution of subcortical FLAIR hyper signal intensities (D, Axial FLAIR sequence).
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Lastly, the following brain CT and MRI did not demonstrate any acute findings with stable ARIA-H and no recurrent ARIA-E (Fig. 1).
PMC9647162_02
(A) Baseline MRI in FLAIR sequence. (B) FLAIR sequence on day 154 demonstrates new symmetric FLAIR hyper signal intensity in the subcortical motor cortex, arrows. (C) Follow-up MRI on day 203 shows interval spontaneous resolution of abnormal signal changes.
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The follow-up MRI on day 203 showed interval resolution of abnormal signal intensity (Fig. 2).