18-year-old female with migraine headaches, reported to have a nonspecific nodular T2/FLAIR hyperintense focus along the medial right temporal lobe on outside MRI. There is a subtle subcentimeter non-enhancing focus of T2/FLAIR hyperintensity along the surface of the right posterior aspect of the temporal horn, presumably corresponding to the abnormality described on outside study which is not available for direct comparison. The signal abnormality is best seen on coronal STIR series 1301, image 24 and axial FLAIR series 401, image 13. There is minimal nonspecific asymmetric enlargement of the right temporal horn in this region.Brain parenchyma is otherwise unremarkable. There is no restricted diffusion to suggest acute ischemia. No intracranial hemorrhage. No intracranial mass or mass-effect. The ventricles are within normal limits in size and configuration. No abnormal parenchymal or meningeal enhancement. Major flow-voids are preserved.Sella and orbits are grossly within normal limits. Paranasal sinuses and mastoid cells are clear. Bone marrow signal and extracranial soft tissues are within normal limits.
1.Subtle subcentimeter non-enhancing focus of T2/FLAIR hyperintensity along the surface of the right posterior aspect of the temporal horn is nonspecific and of uncertain clinical significance. Differential considerations include nonspecific gliosis and tiny focus of subependymal gray matter heterotopia. There is also the possibility that this is developmental in etiology given the minimal asymmetric enlargement of right temporal horn.2.Brain parenchyma is otherwise unremarkable.