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Preoperative radiographic imaging. a Axial view of CT showing an isodensity tumor lesion in right frontal region. b Gadolinium (Gd)-enhanced T1-weighted image shows homogenous enhanced tumor. c Fluid-attenuated inversion-recovery (FLAIR) image demonstrates brain edema surrounding tumor. d Sagittal view of Gd-enhanced T1-weighted image shows that the bottom of tumor does not reach the anterior skull base
