Multiple sclerosis: ataxia and dysphagia. There are extensive, largely confluent, T2 hyperintense and T1 hypointense lesions involving the supratentorial and infratentorial white matter. In particular, there is a new enhancing lesion in the midline medulla. There are several nearly enhancing lesions, including within the left superior frontal gyrus, parietal lobe, posterior right frontal corona radiata, and right occipital lobe. On the other hand, previously demonstrated abnormal enhancement has resolved. There is a developmental venous anomaly in the right frontal lobe. The ventricles are stable in size and configuration, including diffuse cerebral volume loss as well as cavum septum pellucidum and vergae. The skull, orbits, and extracranial soft tissues are unremarkable.
Extensive demyelinating lesions in the supratentorial and infratentorial brain parenchyma with several nerve enhancing lesions and interval resolution of previously demonstrated abnormal enhancement in other areas.