Fig. 1

In August 2014, an abnormal patchy signal shadow was observed on the medial inferior side of the right temporal lobe. The shadow had an unclear boundary, and had a size of approximately 29 * 32 mm (a, arrow). Additionally, there was an abnormal signal shadow in the white matter of the right frontal lobe (b, arrow). In February 2020, abnormal patchy signal shadows were observed in the subcortical region of the anterior part of the right temporal lobe (c, arrow) and in the white matter of the right frontal lobe (d, arrow). In April 2021, abnormal patchy signal shadows were observed in the medial inferior region of the right temporal lobe (e, arrow) and in the white matter of the right frontal lobe (f, arrow)