Isodense heterogeneous mass measuring 3.4 x 4.2 x 6.6 cm, filling and expanding the left ventricle, centered in the trigone, showing no calcification, enhancing intensely and heterogeneously. Small amount of fresh hemorrhage in the left ventricle, including the left temporal horn. Mild peritumoral vasogenic edema.
CSF spaces of normal width, except for focal dilatation of left temporal horn.
Midline preserved.
The cisterns are open, the craniocervical junction is normal.
Normally aerated paranasal sinuses.
Osseous component preserved.
In summary:
Primary left ventricle mass with small amount of fresh peritumoral bleed. Features compatible with choroid plexus papilloma or choroid plexus carcinoma. Astrocytoma and ependymoma also on the list of differentials.