MRI
Axial FLAIR
Axial T2
Axial Gradient Echo
Axial T1
Axial MR Perfusion (CBV)
Axial DWI
Axial ADC
Sagittal T1
Sagittal T2
Coronal T1 C+
Axial T1 C+
Centred within the trigone of the left lateral ventricle is a large rounded vividly enhancing homogeneous mass surrounded by a some high T2 signal within the white matter of the temporal parietal lobes consistent with vasogenic oedema. It is clearly intraventricular, is isointense to grey matter on T1 and T2-weighted sequences and demonstrates moderate diffusion restriction and elevated cerebral blood volume of blood flow on perfusion.
In the floor of the left middle cranial fossa is an extra-axial well-circumscribed vividly enhancing lesion with similar signal intensity, associated with minor hyperostosis, characteristic of a meningioma. The remainder of the brain is unremarkable in appearance.
Conclusion:
Left trigonal intraventricular lesion almost certainly represents an intraventricular meningioma. Second smaller middle cranial fossa meningioma in the middle cranial fossa.