Sickle cell disease and left P1 segment small aneurysm or infundibulum: surveillance imaging. MRI: There is an area of encephalomalacia and susceptibility effect in the anterior right frontal lobe. There is no evidence of acute infarct. There are unchanged mild scattered foci of non-specific T2 hyperintensity elsewhere in the cerebral white matter. There is no abnormal intracranial enhancement. The ventricles are unchanged 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 unchanged 2 to 3mm wide conical outpouching involving the P1 segment of the left posterior cerebral artery. The rest of the major cerebral arteries are unremarkable, without evidence of significant steno-occlusive lesions.
1. Unchanged right frontal lobe encephalomalacia related to a prior hemorrhagic infarct.2. Unchanged 2 to 3mm wide conical outpouching involving the P1 segment of the left posterior cerebral artery. 