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A : Enhanced T1-weighted axial image showing a 5.3×4.3 cm-sized intraaxial mass in the right frontal lobe. The lesion extends into the left hemisphere through the corpus callosum. Peritumoral edema is extensive. B : Intraoperative MEP recording was stable during the operation. C : Postoperative CT scan showing acute hematoma in the right frontal lobe and subfacine herniation. MEP : motor evoked potential.
