Radiological evaluation of the brain. T1-weighted axial gadolinium-enhanced magnetic resonance image demonstrates an enhancing tumour of the right frontal lobe (A). T2-weighted image demonstrates the same lesion as in the previous image, with notable tissue edema (B). This finding is consistent with a high-grade glioblastoma. On fast fluid-attenuated inversion-recovery (FLAIR) MRI scan a zone of edema is identified around the tumour demonstrating increased signal intensity (C, D).