Assessment of the Circle of Willis with Cranial Tomography Angiography

Medical Science Monitor : International Medical Journal of Experimental and Clinical Research
Ayse KaratasAysun Uz

Abstract

The circle of Willis is a major collateral pathway important in ischemic conditions. The aim of our study was to assess the structural characteristics of the circle of Willis within the Turkish adult population, along with variations and arteries involved in the measurement of diameters and lengths on cranial computed tomography angiography (CTA). One hundred adult patients who underwent CTA images were evaluated retrospectively. Results of the study revealed 82% adult, 17% fetal, and 1% transitional configurations. A complete polygonal structure was observed in 28% of cases. Variations of the circle of Willis were more common in the posterior portion. Hypoplasia was found to be the most common variation and was observed as a maximum in the posterior communicating artery (AComP). The patency and size of arteries in the circle of Willis are important in occlusive cerebrovascular diseases and cerebrovascular surgery. Although CTA is an easily accessible non-invasive clinical method for demonstrating the vascular structure, CTA should be evaluated taking into account image resolution quality and difficulties in the identification of small vessels.

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Citations

Jan 30, 2018·Journal of Ophthalmology·Hui WangHongyang Li
Nov 27, 2018·The Journal of Maternal-fetal & Neonatal Medicine : the Official Journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians·P RosatiJ Morales-Roselló
Mar 11, 2020·Journal of Intensive Care Medicine·Andrés Fabricio Caballero-LozadaCarolina Zorrilla-Vaca
Jul 28, 2020·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·Joshua D JonesKatherine Sanders

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