Female, 48 years old, with altered mental status. Assess for encephalitis. History of multiple sclerosis. No restricted diffusion is seen. No areas of parenchymal edema or mass effect are observed.Numerous foci of T2 hyperintensity are seen within the juxtacortical and periventricular white matter. These range in size from punctate up to approximately 1 cm in diameter. They have increased in size and number compared to the prior examination.No evidence of pathologic parenchymal or extra-axial enhancement is seen. No acute intracranial hemorrhage or any abnormal extra-axial fluid collections are detected. The ventricular system is normal in size and morphology.
1.No definite acute intracranial abnormality or evidence of active encephalitis is seen.2.Numerous scattered white matter lesions have increased in size and number when compared to the prior examination. These lesions would be compatible with a diagnosis of demyelinating disease as per the patient's history.