Figure 1. A, B) Preoperative magnetic resonance imaging (MRI) T2 images of reported patient 1, diagnosed with atypical meningioma WHO grade II showing border areas without a clear arachnoid plane with a tendency to invade the SMA cortex (image A, white arrows). There are also areas with a clear arachnoid plane with a distinct border, which had been easily dissected without affection of the cerebral cortex (image B, black arrows). C, D) Postoperative T1 MRI of patient 1, three months after the operation.
