 Redemonstrated are cystic structures within the right parietal white matter demonstrating CSF isointensity on all sequences without enhancement or adjacent parenchymal abnormality. When compared to the recent CT, there are more of these foci within this small cluster given the better soft tissue discrimination of MRI. These have no associated mass effect.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. No diffusion-weighted abnormalities are identified. Myelination is mature. There are no extraaxial fluid collections or subdural hematomas. Flow voids are present within the major vessels indicating patency. The mastoid air cells are clear. There are no abnormal enhancing foci.
Redemonstrated are cystic structures within the right parietal white matter demonstrating CSF isointensity on all sequences without enhancement or adjacent parenchymal abnormality. This constellation of features is consistent with dilated perivascular spaces which have no clinical significance.