Known aneurysm: repair scheduled. MRI: There is no evidence of intracranial hemorrhage or acute infarct. There is extensive cerebral and pontine white matter T2 hyperintensity. There is no abnormal intracranial enhancement. 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, paranasal sinuses, and scalp soft tissues are grossly unremarkable.MRA: There is an inferiorly-directed saccular aneurysm arising from the A2 segment of the left anterior cerebral artery near the left pericallosal artery measuring up to 9 mm in diameter, with a 2 mm wide neck. There is no evidence of significant steno-occlusive lesions.
1. Saccular aneurysm arising from the A2 segment of the left anterior cerebral artery measuring up to 9 mm in diameter, with a 2 mm wide neck.2. Nonspecific extensive cerebral and pontine white matter T2 hyperintensity may represent chronic hypertensive encephalopathy. 