 There is a T2/FLAIR hyperintense cortical and subcortical mass involving the right mesial temporal lobe, including at least the head of the hippocampus. The mass has ill-defined margins but appears overall stable allowing for differences in technique, approximately measuring in the transverse axis 2.3 cm (previously 2.4 cm), and in the craniocaudal axis 2.3 cm (previously 2.5 cm). The margins in the AP view could not be well delineated. This mass has no restricted diffusion. There is thin smooth dural enhancement superomedial to the mass, but the mass itself is not enhancing. Tiny T2 hyperintense cystic areas are seen along the anterior aspect of the mass. The right temporal horn is posteriorly displaced due to mass effect.There are no susceptibility abnormalities. The ventricular size is normal. There is no midline shift. Basal cisterns are patent. Vascular flow voids are normal.
There is an overall stable appearance of a nonenhancing slightly ill-defined mass involving the mesial right temporal lobe with thin smooth superomedial dural enhancement. Differential diagnosis includes pleomorphic xanthoastrocytoma, DNET, pilocytic astrocytoma or other low grade astrocytoma, and ganglioglioma.