Fabien Fredon1,2, Maxime Baudouin3, Jeremy Hardy4, Assia Kouirira4, Léa Jamilloux4, Abdelkader Taïbi5, Christian Mabit4, Denis Valleix4, Aymeric Rouchaud3,5, Sylvaine Durand-Fontanier4,3,5. 1. Department of Human Anatomy, Laboratoire d'Anatomie, Faculty of Medicine, University of Limoges, 2, rue du Docteur Marcland, 87025, Limoges, France. fabienfredon@gmail.com. 2. Service de Chirurgie Digestive, Générale et Endocrinienne, Centre Hospitalier Universitaire de Limoges, 2 Avenue Martin-Luther King, 87000, Limoges, France. fabienfredon@gmail.com. 3. Department of Radiology, Limoges University Hospital, CHU Dupuytren, 2, Avenue Martin-Luther-King, 87000, Limoges, France. 4. Department of Human Anatomy, Laboratoire d'Anatomie, Faculty of Medicine, University of Limoges, 2, rue du Docteur Marcland, 87025, Limoges, France. 5. University of Limoges, XLIM, UMR CNRS 7252, 87000, Limoges, France.
Abstract
PURPOSE: This magnetic resonance imaging study examined the most frequent anatomical variants of the anterior communicating artery (ACoA) complex of the cerebral arterial circle, and aimed to determine whether they were associated with ACoA complex aneurysm. METHODS: The study enrolled 669 patients. Using three-dimensional time-of-flight magnetic resonance angiography, 617 patients were classified into the following groups based on the anatomical variation in the ACoA complex: no ACoA complex anomaly; ACoA complex aneurysm; and vascular anomaly distant from the cerebral arterial circle. RESULTS: Of the 617 classified subjects, the classical anatomical description applied to 48.73% in the no ACoA complex anomaly group and 37.5% in the ACoA complex aneurysm group. One variant (left anterior cerebral artery segment A1 hypoplasia) was significantly more frequent in the ACoA complex aneurysm group. There was no sex difference in the prevalence of any variant. CONCLUSIONS: Anatomical variants of the ACoA complex of the cerebral arterial circle were found in almost half of the subjects. One variant seemed to be associated with a higher likelihood of an aneurysm, but causality could not be inferred.
PURPOSE: This magnetic resonance imaging study examined the most frequent anatomical variants of the anterior communicating artery (ACoA) complex of the cerebral arterial circle, and aimed to determine whether they were associated with ACoA complex aneurysm. METHODS: The study enrolled 669 patients. Using three-dimensional time-of-flight magnetic resonance angiography, 617 patients were classified into the following groups based on the anatomical variation in the ACoA complex: no ACoA complex anomaly; ACoA complex aneurysm; and vascular anomaly distant from the cerebral arterial circle. RESULTS: Of the 617 classified subjects, the classical anatomical description applied to 48.73% in the no ACoA complex anomaly group and 37.5% in the ACoA complex aneurysm group. One variant (left anterior cerebral artery segment A1 hypoplasia) was significantly more frequent in the ACoA complex aneurysm group. There was no sex difference in the prevalence of any variant. CONCLUSIONS: Anatomical variants of the ACoA complex of the cerebral arterial circle were found in almost half of the subjects. One variant seemed to be associated with a higher likelihood of an aneurysm, but causality could not be inferred.
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