Reason: posterior fossa stroke History: left sided dysmetria, ataxia The CSF spaces are appropriate for the patient's stated age with no midline shift. On T2 and MRI there are subcentimeter in size foci of T2 and flair signal hyperintensity in the left centrum semiovale as well as the left inferior frontal gyrus subcortical white matter. Additionally there are several punctate subcortical and periventricular white matter lesions in the right and left hemispheres which are hyperintense on T2 and flair MRI.No abnormal mass lesions are appreciated intracranially. No intracranial hemorrhage is identified. No edema is identified within the brain parenchyma.Normal vascular flow voids are present in the distal carotid and vertebral arteries, the basilar artery and the proximal anterior, middle and posterior cerebral arteries as well as the internal cerebral veins and superior sagittal sinus. Findings suggest a bilateral fetal origins of the posterior cerebral arteries.The visualized portions of the paranasal sinuses are clear. The visualized portions of the mastoid air cells are clear. The visualized portions of the orbits are intact.
1.There is no MRI evidence for acute ischemic cerebral infarction.2.A couple lesions present in the left centrum semiovale and subcortical white matter of the left frontal lobe which are nonspecific. Etiology cannot be established on this exam. Periventricular and subcortical white matter signal changes of a mild degree are present which are nonspecific. 3.There is no evidence for acute ischemic cerebral infarction.