Cerebral aneurysm, nonruptured [I67.1], Reason for Study: ^Reason: stenosis of RICA, right PCA, and moderate stenosis of left ICA noted, as well as the 6 mm saccular basilar tip aneurysm. History: yearly surveillance Brain MRIThere is no evidence of acute ischemic or hemorrhagic lesion.Focal tissue loss on the right posterior inferior thalamus with the susceptibility artifacts is again seen, unchanged since prior scan.Scattered FLAIR/T2 high signal intensity on periventricular white matters indicating nonspecific small vessel ischemic disease, unchanged since prior scan.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, restricted diffusion/acute ischemia. The midline structures and cranial-cervical junction are normal. The mastoid air cells are clear.Mucosal thickening on the right maxillary sinus is again seen, unchanged since prior scan.Brain MRA3D time of flight MOTSA MRA brain images with maximum intensity projections of the anterior/posterior intracranial circulation demonstrate about 6 mm sized the basilar tip aneurysm, grossly unchanged since prior scan. The distal right vertebral artery is diminutive indicating decreased flow comparing to that of left side.Multifocal intracranial arterial luminal irregularity and less than 50% of narrowing are seen especially at the left ICA cavernous sinus segment and bilateral PCAs, grossly unchanged since prior scan.Although the signal intensity of intracranial arterial system appears to be lessen especially areas of luminal irregularities and narrowings. However, this is more likely related to different scanner, especially current scan was performed at 1.5 Tesla wire prior scan was performed at 3 Tesla motion instead of lesions progression. There is no evidence of other intracranial arterial aneurysm.
1. No evidence of acute ischemic or hemorrhagic lesion.2. Chronic tissue loss with hemosiderin deposition on the right thalamus, unchanged.3. 6mm sized basilar tip aneurysm, unchanged.4. Unchanged multifocal intracranial arterial luminal narrowings (less than 50%). 