CT
Axial C+ delayed
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.
Conclusion:
Imaging differential diagnosis includes an intraventricular meningioma with brain parenchymal extension. and (less likely) primary CNS lymphoma.