title: Unusual variant of the anterior cerebral artery.
abstract: A rare abnormality of the A1 segment of the anterior cerebral artery (ACA) is reported. The right ACA bifurcated into two parts at the middle point of the A1 segment, and these segments did not rejoin. The superior right A1 segment connected with the left A1 and formed a single pericallosal artery. The inferior right A1, from which the right ophthalmic artery originated, had no connection with the left A1.
authors.affiliation: Department of Neurosurgery, Shimane University School of Medicine, Japan. nogeka@med.shimane-u.ac.jp
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Maruyama
authors.forename: Atsushi
authors.initials: A
authors.lastname: Fukuma
authors.forename: Ikuo
authors.initials: I
authors.lastname: Ihara
authors.forename: Seiichi
authors.initials: S
authors.lastname: Ando
authors.forename: Toshiki
authors.initials: T
authors.lastname: Yamasaki
authors.forename: Kouzo
authors.initials: K
authors.lastname: Moritake
mesh_terms: D000328:Adult; D020771:Anterior Cerebral Artery / Q000002:abnormalities* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D011859:Radiography