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Table of Contents
Vol. 23, No. 4, 2007
Issue release date: March 2007
Section title: Original Paper
Cerebrovasc Dis 2007;23:267–274
(DOI:10.1159/000098326)

Anatomic Variations in the Circle of Willis in Patients with Symptomatic Carotid Artery Stenosis Assessed with Multidetector Row CT Angiography

Waaijer A.a · van Leeuwen M.S.a · van der Worp H.B.b · Verhagen H.J.M.c · Mali W.P.T.M.a · Velthuis B.K.a
Departments of aRadiology, bNeurology and cSurgery, University Medical Center Utrecht, Utrecht, The Netherlands

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: May 11, 2006
Accepted: September 01, 2006
Published online: December 29, 2006
Issue release date: March 2007

Number of Print Pages: 8
Number of Figures: 2
Number of Tables: 2

ISSN: 1015-9770 (Print)
eISSN: 1421-9786 (Online)

For additional information: http://www.karger.com/CED

Abstract

Purpose: To assess the presence of anterior and posterior collateral pathways in the circle of Willis in patients with symptomatic carotid artery stenosis (SCAS) and to compare this to patients without carotid artery stenosis. Materials and Methods: Multislice CT angiography was performed in 91 patients and 91 control subjects. Using consensus reading, 2 observers evaluated the presence and diameter of the anterior communicating artery (AcomA), the A1 segments of the anterior cerebral arteries, the posterior communicating arteries (PcomA) and the P1 segments of the posterior cerebral arteries. Anterior or posterior pathways were assumed to be present if the diameter of continuous arterial segments was >1 mm; both A1 segments and AcomA anterior, and ipsilateral P1 segment and PcomA posterior. Comparison between patients and controls was performed using the χ2 test. Results: In the patients we found significantly more hypoplastic (<1 mm) or invisible A1 segments (16 and 14 vs. 4 and 1, respectively, p < 0.01). The AcomA was invisible in 4 patients versus 1 control. An isolated compromised anterior pathway and a combined compromised anterior and posterior pathway occurred more frequently in the patients as compared to the controls; 9 versus 1% (p < 0.01) and 26 versus 4% (p < 0.01). Conclusion: A compromised anterior collateral pathway, usually combined with a compromised posterior pathway, occurs more frequently in patients with SCAS as compared to controls, which suggests a relation between symptomatic carotid stenosis and an incomplete circle of Willis.

© 2007 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: May 11, 2006
Accepted: September 01, 2006
Published online: December 29, 2006
Issue release date: March 2007

Number of Print Pages: 8
Number of Figures: 2
Number of Tables: 2

ISSN: 1015-9770 (Print)
eISSN: 1421-9786 (Online)

For additional information: http://www.karger.com/CED


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