Abnormal results of other function studies of central nervous system [R94.09], Reason for Study: ^Reason: 6 month repeat MRI looking for hyperintensities to compare History: as above There is no evidence of acute ischemic or hemorrhagic lesion on this scan.There is no evidence new high signal intensity lesion on FLAIR/T2 images.Previously found multifocal high signal intensity lesions on FLAIR/T2 images including the right middle cerebellar peduncle, left posterior temporal lobe periventricular white matter (just underneath of the left lateral ventricle occipital horn), and right parietal lobe (right parietal operculum) appear to be stable or slightly not as conspicuous as it was.About 4.5mm downward herniation of cerebellar tonsils through the foramen magnum, no change since prior scan. The ventricles, sulci and cisterns are symmetric and unremarkable. There is no mass, mass effect, edema, midline shift, intra or extra-axial fluid collection/hemorrhage, or restricted diffusion/acute ischemia. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The mastoid air cells are clear. Minimal mucosal thickening on ethmoid sinuses and sphenoid sinus.
1. Stable or slightly decreased signal intensity of previously noted lesions on FLAIR/T2 images including right middle cerebellar peduncle, left periventricular white matter especially inferior aspect of the lateral lateral ventricle occipital horn and the right parietal operculum since prior scan.2. No evidence of acute ischemic or hemorrhagic lesion on this scan.