Large lesion is noted overlying the right parietal lobe, the majority is similar to CSF signal (but not identical) and there is a peripheral more solid component adjacent to the dura. The lesion is likely extra-axial as it is broad based to the overlying dura and there is displacement of the vessels overlying the cortex on this side. No underlying vasogenic oedema. There is mass effect with 10 mm of midline shift. There is also slight dilation of the lateral ventricles. A small amount of diffusion restriction is noted in the solid component, and there is modest enhancement of the solid component. A small amount of dural enhancement is also noted. A non specific high T2 signal focus is noted in the right temporal lobe.
CONCLUSION: Large lesion overlying the right parietal lobe, likely extra-axial and hence it likely represents the suspected diagnosis of a cystic meningioma.