title: A rare anatomical variant: median anterior cerebral artery fenestration associated with an azygous infra-optic anterior cerebral artery.
abstract: We present a patient who had a median anterior cerebral artery fenestration with a congenital azygous infra-optic anterior cerebral artery. This rare combination of abnormalities was an incidental finding in a patient who suffered spontaneous subarachnoid haemorrhage from a ruptured anterior cerebral artery aneurysm.
authors.affiliation: Division of Neurosurgery, Department of Surgery, Prince of Wales Hospital, The Chinese University of Hong Kong, 8 Pak Hok Ting Street, Shatin, New Territories, Hong Kong SAR, China. georgewong@surgery.cuhk.edu.hk
authors.forename: George Kwok Chu
authors.initials: GK
authors.lastname: Wong
authors.forename: Ki
authors.initials: K
authors.lastname: Wang
authors.forename: Simon Chun Ho
authors.initials: SC
authors.lastname: Yu
authors.forename: Wai Sang
authors.initials: WS
authors.lastname: Poon
mesh_terms: D020771:Anterior Cerebral Artery / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000473:pathology*; D002343:Carotid Artery, Internal / Q000002:abnormalities* / Q000473:pathology* / Q000601:surgery; D020785:Central Nervous System Vascular Malformations / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D002533:Cerebral Angiography / Q000379:methods; D035262:Cranial Fossa, Anterior / Q000033:anatomy & histology / Q000601:surgery; D035301:Cranial Fossa, Middle / Q000033:anatomy & histology / Q000601:surgery; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009900:Optic Nerve / Q000033:anatomy & histology; D009915:Orbit / Q000033:anatomy & histology; D014057:Tomography, X-Ray Computed / Q000379:methods