case_images: PMC6357285_01
case_images: (A) Pre-operative magnetic resonance imaging (MRI; T1-weighted sequence after gadolinium enhancement) showing a large mass with regular borders and surrounding edema, exerting a mass effect on the adjacent frontal lobe and a 12-mm left-to-right midline shift. (B) Post-operative MRI (T1-weighted sequence after gadolinium enhancement) demonstrating complete tumor removal.
case_images: fneur-10-00023-g0001.jpg
case_images: PMC6357285_01_fneur-10-00023-g0001.jpg
case_images: F1
case_images: Brain magnetic resonance imaging (MRI) with gadolinium enhancement showed a large mass with regular borders and surrounding edema, exerting a mass effect on the adjacent frontal lobe (Figure 1A). Surgery was suggested and successfully performed, with complete resection, as indicated in the postoperative MRI (Figure 1B).
case_images: (A) Brain magnetic resonance imaging (MRI; T1-weighted sequence after gadolinium enhancement) showing the fusiform thickening of the localized dura mater in the left frontal-temporal lobe, which is vividly enhanced with contrast; (B) Brain MRI (T1-weighted sequence) showing the fusiform thickening of the localized dura mater in the left frontal-temporal lobe. (C,D) Brain MRI (T1- and T2-weighted sequence) showing a large area of softening lesion and glial hyperplasia in the left frontal-temporal lobe.
case_images: fneur-10-00023-g0002.jpg
case_images: PMC6357285_01_fneur-10-00023-g0002.jpg
case_images: F2
case_images: A few days prior to the visit (in December 2017), he had undergone a brain MRI, which showed a softening lesion, glial hyperplasia, and localized thickening and enhancement of the dura (Figure 2A) in the left frontal-temporal lobe. In March 2018, the MRI of the eyes demonstrated a stronger signal of the cerebral dura (Figure 2B), a large area of the softening lesion, and glial hyperplasia (Figures 2C,D) in the left frontal-temporal lobe, as observed previously.
case_images: (A,B)
  18F-fluorodeoxyglucose positron-emission tomography revealing low glucose metabolism in the left frontal-temporal lobe.
case_images: fneur-10-00023-g0003.jpg
case_images: PMC6357285_01_fneur-10-00023-g0003.jpg
case_images: F3
case_images: However, no signs of tumor were indicated on the 18F-FDG PET scan performed in February 2018 (Figures 3A,B).