24-year-old female experiencing left-sided weakness, history of multiple sclerosis Redemonstrated are periventricular and subcortical white matter T2 hyperintense lesions, some of which are perpendicularly oriented to the lateral ventricles. There were also similar-appearing lesions within the right posterior medulla and middle cerebellar peduncles. There is a definite new large lesion adjacent to the frontal horn of the left lateral ventricle. None demonstrate contrast enhancement, including the new left frontal lobe lesion.The ventricles and sulci are normal in size. The cerebellar tonsils are in normal position. There are no masses, mass effect or midline shift. The pituitary gland is normal in size. There is no evidence for intracranial hemorrhage or acute cerebral, brainstem or cerebellar infarction. There are no extraaxial fluid collections or subdural hematomas. Flow voids are present within the major vessels indicating patency. The paranasal sinuses and mastoid air cells are clear.
There is redemonstration of multiple white matter lesions as well as brainstem lesions. There is a definite new large lesion adjacent to the frontal horn of the left lateral ventricle. None demonstrate contrast enhancement, including the new lesion.