title: Giant vertebro-basilar aneurysm: an unusual cerebello-pontine angle lesion.
abstract: Acoustic neuromas (vestibular schwannomas) comprise more than 90 per cent of all cerebello-pontine angle (CPA) lesions. We present a rare case of a giant vertebro-basilar aneurysm presenting as a CPA lesion. The general condition of the patient precluded the completion of the magnetic resonance (MR) sequences. The clinical and limited radiological results (T2 images alone, the features of which were not specific) initially did not lead to a specific diagnosis. To obtain further radiological information a computed tomography (CT) scan with contrast was performed and this revealed the lesion to be an aneurysm. The diagnostic difficulties and the treatment dilemmas of such a lesion are discussed. The importance of fine, axial, post-contrast CT arteriography with three-dimensional reconstruction, MR angiography and digital subtraction angiography are highlighted. The limitations of MR imaging in patients with CPA lesions are discussed.
authors.affiliation: Department of Otorhinolaryngology, University Hospital Aintree, Liverpool, UK. sudhakiran7@yahoo.com
authors.forename: Sudhakiran
authors.initials: S
authors.lastname: Kalavagunta
authors.forename: Apostolos
authors.initials: A
authors.lastname: Karkanevatos
authors.forename: Andrew C
authors.initials: AC
authors.lastname: Swift
mesh_terms: D000368:Aged; D002528:Cerebellar Neoplasms / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*; D002530:Cerebellopontine Angle / Q000098:blood supply* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*; D008279:Magnetic Resonance Imaging / Q000379:methods; D009464:Neuroma, Acoustic / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*; D029424:Pulmonary Disease, Chronic Obstructive / Q000150:complications / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed / Q000379:methods