title: Intraoperative anatomical studies in patients with aneurysms of the anterior communicating artery complex.
abstract: The intraoperative anatomical findings of the anterior communicating artery (ACoA) complex in 46 patients with anatomical variations were compared to those in an equal number of patients without variations in order to determine the visualization of the elements of the vascular complex. All patients underwent radical surgery for an ACoA aneurysm by one of three different surgical approaches: transsylvian, anterior interhemispheric, or basal interhemispheric. Visualization of the vascular elements was similar in patients with or without anatomical variations. The differences observed were dependent on the surgical approach selected and on the projection of the aneurysm. It was found that, even when the intraoperative anatomical field and the number of vascular elements visualized are different from those obtained in autopsy studies, the vascular microanatomical characteristics can be confirmed with each surgical approach to the extent necessary to ensure safe clipping of aneurysms in patients both with and without anatomical variations.
authors.affiliation: Department of Surgical Neurology, Research Institute for Brain and Blood Vessels-Akita, Japan.
authors.forename: E
authors.initials: E
authors.lastname: Nathal
authors.forename: N
authors.initials: N
authors.lastname: Yasui
authors.forename: T
authors.initials: T
authors.lastname: Sampei
authors.forename: A
authors.initials: A
authors.lastname: Suzuki
mesh_terms: D002536:Cerebral Arteries / Q000033:anatomy & histology*; D006801:Humans; D002532:Intracranial Aneurysm / Q000473:pathology* / Q000601:surgery*