Loss of vision for 4 mins, MVR and AVR. MRI: There is no evidence of intracranial mass or acute infarct. There are mild scattered foci of white matter T2 hyperintensity in the anterior frontal lobes bilaterally. There are also numerous scattered foci of susceptibility effect in the bilateral cerebral hemispheres, midbrain, and cerebellum. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, and scalp soft tissues are grossly unremarkable. There are small bilateral maxillary sinus retention cysts. MRA: The left vertebral artery is diminutive. Otherwise, there is no evidence of significant steno-occlusive lesions. There is no evidence of saccular aneurysms.
1. Nonspecific mild scattered foci of white matter T2 hyperintensity in the anterior frontal lobes bilaterally, but no evidence of acute infarct or significant steno-occlusive lesions in the cerebral arteries.2. Numerous scattered supratentorial and infratentorial foci of susceptibility effect are nonspecific, but may represent cavernous malformations or chronic microhemorrhages.