title: Combination of olfactory course anterior cerebral artery and accessory middle cerebral artery (MCA) with occluded in situ MCA and related moyamoya phenomenon.
abstract: We describe a rare case of congenital persistence of a primitive olfactory anterior cerebral artery in association with an ipsilateral accessory middle cerebral artery. The normally and anatomically positioned, or in situ, middle cerebral artery was occluded. This, along with a well-developed anastomotic network of lenticulostriate artery domains and leptomeningeal collaterals suggested a moyamoya phenomenon. To our knowledge, ours is the first report of this anatomic variant and the altered conventional vascular territories of supply.
authors.affiliation: Department of Diagnostic Radiology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, 123 Ta-Pei Road, Naio-Sung County, Kaohsiung, Taiwan.
authors.forename: Wei-Che
authors.initials: WC
authors.lastname: Lin
authors.forename: Shih-Wei
authors.initials: SW
authors.lastname: Hsu
authors.forename: Yeh-Lin
authors.initials: YL
authors.lastname: Kuo
authors.forename: Joel A
authors.initials: JA
authors.lastname: Feekes
authors.forename: Hung-Chen
authors.initials: HC
authors.lastname: Wang
mesh_terms: D002536:Cerebral Arteries / Q000002:abnormalities*; D005260:Female; D006801:Humans; D020244:Infarction, Middle Cerebral Artery / Q000473:pathology*; D018810:Magnetic Resonance Angiography; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009072:Moyamoya Disease / Q000473:pathology*