Female, 52 years old, with paresthesias, history of MS, follow-up progression. Numerous T2 hyperintense white matter lesions are redemonstrated within the corpus callosum, periventricular white matter, left thalamus, brainstem and posterior fossa. The number and distribution of these lesions have not significantly changed. At most, punctate very subtle foci of signal abnormality within the right superior frontal gyrus and the left cerebral hemisphere are not clearly identified on the prior examination, but this could be due to differences in technique and generally improved image quality on the present study.These lesions exert no mass effect and there is no evidence of parenchymal edema. No restricted diffusion is seen. There is no evidence to suggest intracranial hemorrhage or any abnormal extra-axial fluid collections. The ventricular system stable and normal in size.
Numerous white matter lesions are demonstrated compatible with the history of multiple sclerosis. The size and number of these lesions have not convincingly changed from the prior exam.