J Korean Neurosurg Soc.  2007 Oct;42(4):342-345. 10.3340/jkns.2007.42.4.342.

Saccular Aneurysm of the Azygos Anterior Cerebral Artery: Three Case Reports

Affiliations
  • 1Department of Neurosurgery, Sanggye Paik Hospital, Inje University College of Medicine Seoul, Korea. skpark@sanggyepaik.ac.kr

Abstract

The azygos anterior cerebral artery, a rare anomaly in the circle of Willis in which only a single vessel supplies the medial aspects of both anterior cerebral hemispheres, is closely associated with saccular aneurysms. We present three cases of azygos anterior cerebral artery aneurysms among the 781 cerebral aneurysms surgically treated at our institution in an 11-year period. These three cases all involved elderly women who presented with subarachnoid hemorrhage. Conventional cerebral angiography and CT angiography revealed small saccular aneurysms at the distal ends of the azygos anterior cerebral arteries. These aneurysms were clipped successfully using a bifrontal interhemispheric approach. Hence, the pathogenesis of these particular aneurysms relating to hemodynamic change, associated anomalies, and surgical pitfalls is discussed with review of literature.

Keyword

Azygos anterior cerebral artery; Saccular aneurysm; Anomaly

MeSH Terms

Aged
Aneurysm*
Angiography
Anterior Cerebral Artery*
Cerebral Angiography
Cerebrum
Circle of Willis
Equipment and Supplies
Female
Hemodynamics
Humans
Intracranial Aneurysm
Subarachnoid Hemorrhage
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