 There are no foci of restricted diffusion. No susceptibility abnormalities visualized.A small circumscribed area of high signal in T2 and FLAIR with abnormal enhancement is again seen in the left inferior cerebellar lobe, which is intra-axial and peripherally located, measuring up to 7 mm in transaxial view. There is no surrounding edema. The lesion is unchanged since the previous study.The cerebellar tonsils extend 5 mm below the level of the foreman magnum, unchanged from the previous study. The cerebellar tonsils are rounded in configuration. There is moderate crowding at this level.The ventricles and basal cisterns are unchanged in volume and configuration. No midline shift or herniation. The skull and extra-axial soft tissues are unremarkable.
1. Continued stability of a subcentimeter FLAIR hyperintense enhancing lesion in the inferior left cerebellar hemisphere, peripherally located, now over a course of 2.5 years. This is nonspecific but continued follow up is recommended to exclude low grade neoplasm. Differential includes inflammatory processes.2. Slightly low lying cerebellar tonsils, unchanged since the previous study.