title: An unusual aneurysm of a basilar perforating artery presenting with a subarachnoid haemorrhage.
abstract: A 65-year-old man had a perimesencephalic subarachnoid haemorrhage with normal angiography initially. After a rebleed 5 days later, a repeat angiogram revealed a pea-like aneurysm a short distance behind and below the basilar bifurcation. It was not amenable to endovascular treatment and the feeding vessel was coagulated and divided at open surgery via a sub temporal approach. He developed a right hemiparesis and dysphasia, from which he slowly recovered. Basilar perforating artery aneurysms are extremely rare, with only 4 previous cases reported.
authors.affiliation: Department of Neurosurgery, University Hospital of North Staffordshire, North Staffordshire Royal Infirmary, Stoke-on-Trent, UK.
authors.forename: Vino
authors.initials: V
authors.lastname: Apok
authors.forename: Andrew
authors.initials: A
authors.lastname: Tarnaris
authors.forename: Howard L
authors.initials: HL
authors.lastname: Brydon
mesh_terms: D000368:Aged; D017542:Aneurysm, Ruptured / Q000150:complications* / Q000601:surgery; D003399:Craniotomy / Q000379:methods; D020773:Headache Disorders / Q000209:etiology; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications* / Q000601:surgery; D008297:Male; D008866:Microsurgery / Q000379:methods; D013345:Subarachnoid Hemorrhage / Q000209:etiology* / Q000601:surgery; D014057:Tomography, X-Ray Computed