Multiple sclerosis [G35], Reason for Study: ^Reason: MS; f/u progression History: leg weakness There are multifocal bihemispheric periventricular and deep white matter high signal intensity lesions on FLAIR imaging.The extent and number of high signal intensity lesions appear to be increased in number and size since prior scan. In addition, there are multiple new lesions involving left cerebellar hemisphere, lateral aspect of left side Pons, mid to lower pons, left middle cerebellar peduncle and pontomedullary junction.The ventricles, sulci and cisterns are symmetric and unremarkable. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.
1. Interval progression of supratentorial white matter lesions since prior scan.2. New development of posterior fossa white matter lesions as described above since prior scan.