title: Posterior projecting carotid-A1 junctional aneurysms.
abstract: The authors report on two types of carotid-A(1) junctional aneurysms projecting backwards. In the two A(1)-type examples, the aneurysm originated at the posterior wall of the proximal A(1) joining the carotid termination and could be clipped using an ipsilateral pterional approach. However, in the carotid-type example, the aneurysm originated at the posterior wall of the carotid termination just below the A(1) origin, and required a contralateral pterional approach to expose the aneurysm. Although the carotid-A(1) junctional aneurysms are rare, their exact location and size can affect the side of the operative approach.
authors.affiliation: Department of Neurosurgery, Kyungpook National University, Daegu, Republic of Korea. jparkmd@hotmail.com
authors.forename: J
authors.initials: J
authors.lastname: Park
authors.forename: S K
authors.initials: SK
authors.lastname: Baik
mesh_terms: D000783:Aneurysm / Q000175:diagnosis / Q000601:surgery*; D017542:Aneurysm, Ruptured / Q000175:diagnosis / Q000601:surgery*; D002340:Carotid Artery Diseases / Q000175:diagnosis / Q000601:surgery*; D002533:Cerebral Angiography; D003399:Craniotomy / Q000379:methods; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis / Q000601:surgery