title: [Assessment of the perianeurysmal environment of unruptured internal carotid-posterior communicating artery aneurysms with fusion imaging of three-dimensional magnetic resonance cisternography and angiography].
abstract: The anatomical relationship of an unruptured internal carotid-posterior communicating artery aneurysm and the perianeurysmal environment was investigated by using three-dimensional (3D) magnetic resonance cisternography (MRC), angiography (MRA) and newly developed fusion images of 3D MRC and 3D MRA. Contact of an aneurysm with the adjacent intra- and pericisternal structures was observed in cases with the aneurysm developing and extending beyond the capacity of the surrounding subarachnoid space. Deformation and bleb formation of the aneurysmal dome was depicted at the dome in contact with the perianeurysmal environment, including the tentorial edge, the anterior petroclinoid dural fold, the oculomotor nerve, the posterior clinoid process, the dorsum sellae and the cranial base bone. By using the fusion imaging technique of 3D MRC and 3D MRA, assessment of the contact of an unruptured cerebral aneurysm with its perianeurysmal environment can be made. Such contact gives ride to risk of deformation and bleb formation of the aneurysmal dome; and may result in cranial nerve symptoms and accelerate rupture from an unruptured cerebral aneurysm.
authors.affiliation: Department of Neurological Surgery, Ryofukai Satoh Neurosurgical Hospital, Fukuyama-city, Hiroshima 729-0104, Japan. ucsfbtrc@urban.ne.jp
authors.forename: Toru
authors.initials: T
authors.lastname: Satoh
authors.forename: Megumi
authors.initials: M
authors.lastname: Omi
authors.forename: Chika
authors.initials: C
authors.lastname: Ohsako
authors.forename: Atsushi
authors.initials: A
authors.lastname: Katsumata
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Yoshimoto
authors.forename: Shoji
authors.initials: S
authors.lastname: Tsuchimoto
authors.forename: Keisuke
authors.initials: K
authors.lastname: Onoda
authors.forename: Koji
authors.initials: K
authors.lastname: Tokunaga
authors.forename: Kenji
authors.initials: K
authors.lastname: Sugiu
authors.forename: Isao
authors.initials: I
authors.lastname: Date
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002340:Carotid Artery Diseases / Q000175:diagnosis / Q000601:surgery*; D002343:Carotid Artery, Internal / Q000473:pathology*; D002946:Cisterna Magna / Q000473:pathology*; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D002532:Intracranial Aneurysm / Q000175:diagnosis / Q000601:surgery*; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D019635:Neurosurgical Procedures / Q000379:methods