Multiple sclerosis [G35], Reason for Study: ^Reason: MS, f/u progression History: ataxia Extensive T2/FLAIR high signal intensity lesions without evidence of mass effect are seen on bilateral periventricular white matter, corpus callosum, midbrain, pons, medulla and bilateral cerebellar hemispheres which do not show any significant interval change since prior scan.There is focal encephalomalacia on the left occipital lobe which are unchanged since prior scan.On sagittal FLAIR scan, there are suspicious high signal intensity lesions on upper cervical spine but may need dedicated cervical spine MRI for further evaluation if clinically indicated.Slightly prominent cortical sulci and ventricles indicate mild volume loss are seen, unchanged since prior scan.The ventricles, sulci and cisterns are unremarkable. There is no mass, mass effect, edema, midline shift, intra or extra-axial fluid collection. 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. Extensive T2/FLAIR high signal intensity lesions on white matter consistent with the patient's diagnosis of multiple sclerosis. No significant interval change of the extent of lesions since prior scan.2. Unchanged left occipital encephalomalacia.3. Unchanged mild proment cortical sulci and ventricles indicating possible underlying brain volume loss since prior scan. 