Dizziness and giddiness [780.4], Reason for Study: ^Reason: Evaluate for posterior circulation lesions History: episodes of imbalance and running into walls which are PRIOR to feeling lightheaded Extensive but most likely confined to bilateral parieto-occipital deep white matter and periventricular white matter of bilateral lateral ventricle occipital horn area high signal intensity lesions on FLAIR images. These lesions do not show any evidence of restricted diffusion or hemorrhage. Subcortical u-fibers and Grey matter appear to be saved.There is no evidence of acute ischemic or hemorrhagic lesion on this scan. There are several scattered high signal intensity foci on FLAIR images on bilateral frontal white matter which are likely non specific.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 paranasal sinuses and mastoid air cells are clear.
1. Extensive deep and periventricular white matter high signal intensity lesions on bilateral posterior parietal and occipital lobes. These lesions are not specific thus could represent inflammatory lesions including demyelinating disease, infectious process, vascular lesions or chronic ischemic lesions. Clinical correlations could be helpful. 2. No evidence of acute ischemic or hemorrhagic lesion. 