Reason: Multiple sclerosis progression. History: gait problems. There is marked interval progression of T2 hyperintense lesions in the supratentorial and infratentorial white matter. Many of the lesions also display T1 hypointensity. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable.
Marked progression of the demyelinating lesions since March 2013.