There is a large, vividly and homogeneously mass lesion, part of it appears intraventricular within the trigone of right lateral ventricular and a large part in the adjacent right parietal lobe. The mass is well defined, associated with a significant positive mass effect in the form of mid-line shift into the left side, dilatation of the left lateral ventricle and entrapment of the ipsilateral right-sided temporal horn.
Surrounding the mass, is a large area of white matter hypodensity in the right frontal, parietal and temporal lobes, most in keeping with vasogenic oedema.
Imaging differential diagnosis includes an intraventricular meningioma with brain parenchymal extension. and (less likely) primary CNS lymphoma.