title: Serial magnetic resonance imaging of acute spontaneous thrombosis of a giant intracranial aneurysm--case report.
abstract: A 46-year-old female presented with decreased bilateral visual acuity due to an unruptured non-thrombosed giant aneurysm arising from the left internal carotid artery. After admission, acute thrombosis of the aneurysm occurred spontaneously. Her consciousness and visual acuity temporarily worsened. Serial T2-weighted magnetic resonance (MR) imaging showed the size of the low intensity area near the orifice increased, and the aneurysm ruptured thereafter. Trapping of the aneurysm with a high-flow bypass was performed. Serial MR imaging findings clearly demonstrated the intraluminal structure of the thrombosed giant aneurysm. The aneurysm grew in size after thrombosis. The enlarging signal-void area on T2-weighted MR images were indicative of aneurysmal rupture. MR imaging is quite helpful to evaluate the changes of intraluminal thrombosis and size in giant aneurysms.
authors.affiliation: Department of Neurological Surgery, Chiba University School of Medicine.
authors.forename: K
authors.initials: K
authors.lastname: Kansaku
authors.forename: S
authors.initials: S
authors.lastname: Hirai
authors.forename: E
authors.initials: E
authors.lastname: Kobayashi
authors.forename: J
authors.initials: J
authors.lastname: Ono
authors.forename: A
authors.initials: A
authors.lastname: Yamaura
mesh_terms: D000208:Acute Disease; D002343:Carotid Artery, Internal / Q000473:pathology; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis*; D002542:Intracranial Embolism and Thrombosis / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D012075:Remission, Spontaneous