Solid intra-axial hyperdense convoluted right frontal mass measuring approximately 3.5x4.2x4.5 cm, its epicenter in the basal ganglia. The mass enhances intensively after contrast injection. There is extensive peritumoral edema that involves the midbrain and elicits a 9-mm subfalcine herniation, effaces the frontal horn and anterior half of the right ventricle and narrows the third ventricle and displaces it leftward by 8 mm.
The hypodensity around the frontal and occipital horns of the left ventricle could signify periventricular interstitial edema secondary to a trapped ventricle.
The differential list consists mainly of CNS lymphoma and high-grade glioma.