J Korean Neurosurg Soc.  2006 Aug;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

• Kim TH
• Lee HK
• Rhee JJ
• Lee SJ
• Lee CH
• Kim MS

Abstract

OBJECTIVE
We examined the incidence of fenestration in the proximal segment of the anterior cerebral artery(ACA) and reviewed its clinical significance.
METHODS
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.
RESULTS
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.
CONCLUSION
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.

Keyword

Fenestration; Anterior cerebral artery; Incidence

MeSH Terms

Aneurysm
Angiography*
Anterior Cerebral Artery*
Cerebral Angiography
Female
Humans
Incidence*
Magnetic Resonance Angiography*
Male
Neurosurgical Procedures