 There is redemonstration of a blush of enhancement in the ventral cervicomedullary junction with a small venous structure draining this lesion to the sigmoid sinus, which is unchanged since prior. Ventricles remain unchanged in size with mild prominence of the temporal horns again seen. There is a hypoplastic inferior vermis, which is stable.Brain parenchyma is otherwise unremarkable for age. No restricted diffusion to suggest acute ischemia. No intracranial hemorrhage. No intracranial mass or mass-effect. Mucous retention cysts involving the bilateral maxillary and right sphenoid sinus are again seen. Bone marrow signal and extracranial soft tissues are within normal limits.
There is redemonstration of a blush of enhancement in the ventral cervicomedullary junction with a small associated venous structure draining into the sigmoid sinus, which is unchanged since prior and may represent an AV malformation.