title: Fusiform aneurysm of the basilar artery presenting as a cerebellopontine angle mass.
abstract: It is extremely rare that nonsaccular intracranial aneurysms are located at the cerebellopontine angle. A 60-year-old woman presented with dizziness and left-sided sensorineural hearing loss that had developed gradually for 6 months. Magnetic resonance imaging scan and magnetic resonance angiography revealed that the basilar artery was ectatic and markedly displaced to the cerebellopontine angle. The association between otoneurological findings and radiological findings is discussed.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine, University of Tokyo, Tokyo, 113-8655, Japan. y-chihara@umin.ac.jp
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Chihara
authors.forename: Shinichi
authors.initials: S
authors.lastname: Iwasaki
authors.forename: Munetaka
authors.initials: M
authors.lastname: Ushio
authors.forename: Keiko
authors.initials: K
authors.lastname: Sugasawa
authors.forename: Toshihisa
authors.initials: T
authors.lastname: Murofushi
mesh_terms: D001488:Basilar Artery; D002526:Cerebellar Diseases / Q000175:diagnosis*; D002530:Cerebellopontine Angle / Q000000981:diagnostic imaging / Q000473:pathology*; D003937:Diagnosis, Differential; D004244:Dizziness / Q000175:diagnosis / Q000209:etiology; D004584:Electronystagmography; D005260:Female; D005682:Gadolinium; D046088:Hearing Loss, Unilateral / Q000175:diagnosis / Q000209:etiology; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis*; D018810:Magnetic Resonance Angiography; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D011856:Radiographic Image Enhancement; D018570:Risk Assessment
chemical_list: D005682:Gadolinium