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Journal of Korean Neurosurgical Society 2006;40(2): 74-78.
The Incidence and Clinical Significance of Fenestrations in the Horizontal Segment of the Anterior Cerebral Artery Detected by Conventional Angiography and Magnetic Resonance Angiography.
Tae Ho Kim, Hyun Koo Lee, Jong Joo Rhee, Seung Jun Lee, Chae Heuck Lee, Myoung Soo Kim
1Department of Neurosurgery, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea. hanibalkms@hanmail.net
2Department of Neurosurgery, Cheongju Saint Mary's Hospital, Cheongju, Korea.
We examined the incidence of fenestration in the proximal segment of the anterior cerebral artery(ACA) and reviewed its clinical significance.
Cerebral angiography was performed in 843 patients and magnetic resonance angiography(MRA) in 1,787; all patients had, or were suspected to have, cerebrovascular disease. We subsequently reviewed the angiography and MRA data.
Fourteen patients (six men and eight women, 35~81 years of age, median age = 67 years) had proximal ACA fenestrations. Three of the 843 patients (0.36%) undergoing cerebral angiography had fenestrations of proximal ACA as did eleven of the 1,787 MRA patients (0.62%). Seven fenestrations were located on the right side and seven fenestrations were located on the left side. The fenestrated ACA in one patient was associated with a saccular aneurysm at its proximal end. None of the 120 patients who underwent both conventional cerebral angiography and cranial MRA showed fenestration of proximal ACA.
Although fenestration of ACA has little clinical significance, knowledge and recognition of this condition is important in the interpretation of cerebral images, especially during neurosurgical procedures.
Key Words: Fenestration; Anterior cerebral artery; Incidence
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