 Redemonstrated is an intra-axial, predominately cystic lesion in the right frontal lobe measuring approximately 6.5 AP x 5.8 ML x 5.2 CC cm with surrounding confluent T2 signal abnormality. There is substantial mass effect on the right lateral ventricle with partial effacement, and 8mm midline shift to the left. There is mild left lateral ventricular dilatation compatible with entrapment. The lesion is dominated by two large cystic components. Anteromedial to them, there is an elongated ovoid region of near CSF signal intensity through which it appears that small vessels may pass and which may also be a part of the lesion. The walls of the cystic components enhance, as does the solid nodular portion which is located more laterally. The solid portions of the lesion demonstrate mildly increased diffusion signal and subtle susceptibility effect suggesting hemorrhage and/or mineralization. The solid nodular portions of this tumor are inseparable from the right frontal opercular gyri which are thickened and heterogeneous, further supporting that the mass is intra-axial, and possibly originating from the cortex. The internal cystic components show no restricted diffusion.
Stable, large intra-axial cystic and solid mass with enhancing nodular components in the right frontal region with extensive mass effect, and midline shift as described above.