Fig. 1

A preoperative MRI scan of the brain on July 24, 2017, showed a solitary mass in the right occipital lobe (a–d). An MRI scan of the brain 1 day after the operation showed postoperative changes in the right occipital area, with gross total resection of the lesion on August 1, 2017 (e–h). The MRI sequences consisted of the following: T1-weighted imaging (T1WI) for a, g, and h; T2WI for b and f; and diffusion-weighted imaging (DWI) for c, d, and e