 T2 hyperintense and heterogenously enhancing mass seen in the left frontal operculum, measuring 48 x 38 mm (401/129), increased in size since the previous study. There is increased and extensive vasogenic edema tracking to the midline and to the left parietal and occipital lobes. The left lateral ventricle is compressed with mass effect and slight midline shift.Since the prior exam the patient has developed a couple new enhancing foci in the periventricular white matter and subependymal region adjacent to the trigone of the left lateral ventricle and along the left half of the corpus callosum. There is adjacent linear contrast enhancement along the adjacent left transmedullary veins contiguous with the left frontal lobe mass.In addition, another T2 hyperintense and heterogeneously enhancing mass is seen in the left parietal lobe, measuring 40 x 28 mm (301/147), and unchanged in size.A 3mm thick subdural T2 hyperintensity is seen along the left parietal lobe at the craniotomy flap which is unchanged from the previous study of 9/2/2015.The eyeball lenses are thin.
1.Examination was performed for the purpose of stereotactic guidance during surgery.2.Since the prior exam a left frontal lobe mass has increased in size. The associated mass effect has also increased and there is now mild midline shift.3.Since the prior examination enhancing periventricular lesions have developed adjacent to the trigone of the left lateral ventricle and the splenium of the corpus callosum. This appears to track from the left frontal lobe.4.Since the prior exam a left parietal lobe mass has not changed substantially