Anatomical Variations in the Posterior Part of the Circle of Willis and Vascular Pathology in Bilateral Thalamic Infarction

2013 ◽  
Vol 24 (4) ◽  
pp. 325-330 ◽  
Author(s):  
Alex Förster ◽  
Ingo Nölte ◽  
Holger Wenz ◽  
Mansour Al-Zghloul ◽  
Hans U. Kerl ◽  
...  
Keyword(s):  
Posterior Part ◽  
Anatomical Variations ◽  
Circle Of Willis ◽  
Vascular Pathology ◽  
Thalamic Infarction

Anatomical Variations in the Posterior Circle of Willis and Vascular Pathologies in Isolated Unilateral Thalamic Infarction

2015 ◽  
Vol 25 (6) ◽  
pp. 983-988 ◽  
Author(s):  
Johannes Goerlitz ◽  
Holger Wenz ◽  
Mansour Al-Zghloul ◽  
Hans U. Kerl ◽  
Christoph Groden ◽  
...  
Keyword(s):  
Anatomical Variations ◽  
Circle Of Willis ◽  
Thalamic Infarction

Carotid endarterectomy in patients with foetal-type posterior circle of Willis: Is there an indication for local anaesthesia?

VASA ◽  
2011 ◽  
Vol 40 (5) ◽  
pp. 404-407
Author(s):  
Maras ◽  
Tzormpatzoglou ◽  
Papas ◽  
Papanas ◽  
Kotsikoris ◽  
...  
Keyword(s):  
Carotid Endarterectomy ◽  
Local Anaesthesia ◽  
Anatomical Variation ◽  
Anatomical Variations ◽  
Circle Of Willis ◽  
Variable Degree ◽  
Operative Complications ◽  
The Right ◽  
Ica Stenosis ◽  
Symptomatic Stenosis

Foetal-type posterior circle of Willis is a common anatomical variation with a variable degree of vessel asymmetry. In patients with this abnormality, carotid endarterectomy (CEA) may create cerebral hypo-perfusion intraoperatively, and this may be underestimated under general anaesthesia. There is currently no evidence that anatomical variations in the circle of Willis represent an independent risk factor for stroke. Moreover, there is a paucity of data on treating patients with such anatomical variations and co-existing ICA stenosis. We present a case of CEA under local anaesthesia (LA) in a 52-year-old female patient with symptomatic stenosis of the right ICA and coexistent foetal-type posterior circle of Willis. There were no post-operative complications and she was discharged free from symptoms. She was seen again 3 months later and was free from complications. This case higlights that LA should be strongly considered to enable better intra-operative neurological monitoring in the event of foetal-type posterior circle of Willis.

Configuration of Circle of Willis and Its Clinical Significance

2018 ◽  
Vol 08 (04) ◽  
pp. 270-273
Author(s):  
Aisha Hassan Brohi ◽  
Kevin Joseph Jerome Borges ◽  
Gulraiz Hikmat Yar ◽  
Syed Nudrat Nawaid Shah ◽  
Nuzhat Hassan
Keyword(s):  
Clinical Significance ◽  
Anatomical Variations ◽  
Circle Of Willis ◽  
Brain Diseases ◽  
Clinical Implications ◽  
Clinical Effects ◽  
Radiological Procedures

In occlusive vascular brain diseases, the structure of the circle of Willis is of immense importance. A high percentage of variations have been reported in the arteries forming circle of Willis. These have profound clinical implications. With advances in interventional radiological procedures, the interventional radiologists and neurosurgeons need to have thorough knowledge of these variations. This article will help readers understand the significance of anatomical variations and their clinical effects.

Modelling the circle of Willis to assess the effects of anatomical variations and occlusions on cerebral flows

2007 ◽  
Vol 40 (8) ◽  
pp. 1794-1805 ◽  
Author(s):  
J. Alastruey ◽  
K.H. Parker ◽  
J. Peiró ◽  
S.M. Byrd ◽  
S.J. Sherwin
Keyword(s):  
Anatomical Variations ◽  
Circle Of Willis

Anatomical variations in the circle of Willis in canines

2018 ◽  
Vol 47 (6) ◽  
pp. 609-612
Author(s):  
Toshiyuki Tanaka ◽  
Hideo Akiyoshi ◽  
Keiichiro Mie
Keyword(s):  
Anatomical Variations ◽  
Circle Of Willis

scholarly journals Anatomical variations and dimensions of arteries in the anterior part of the circle of Willis

2019 ◽  
Vol 78 (2) ◽  
pp. 259-266 ◽  
Author(s):  
J. Shatri ◽  
S. Cerkezi ◽  
V. Ademi ◽  
V. Reci ◽  
S. Bexheti
Keyword(s):  
Anterior Part ◽  
Anatomical Variations ◽  
Circle Of Willis

scholarly journals A new classification system for the anatomical variations of the human circle of Willis: A systematic review

2021 ◽  
Author(s):  
James R. Ayre ◽  
Peter J. Bazira ◽  
Mohammed Abumattar ◽  
Haran N. Makwana ◽  
Katherine A. Sanders
Keyword(s):  
Systematic Review ◽  
Classification System ◽  
Anatomical Variations ◽  
Circle Of Willis ◽  
New Classification

scholarly journals Anatomical variations of circle of Willis - a cadaveric study

2017 ◽  
Vol 4 (4) ◽  
pp. 1249 ◽  
Author(s):  
Ramanuj Singh ◽  
Ajay Babu Kannabathula ◽  
Himadri Sunam ◽  
Debajani Deka
Keyword(s):  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Anterior Part ◽  
Cerebral Arteries ◽  
Anatomical Variations ◽  
Circle Of Willis ◽  
Anterior Communicating Artery ◽  
Surgical Interventions ◽  
Collateral Channel ◽  
The Right

Background: The circle of Willis (CW) is a vascular network formed at the base of skull in the interpeduncular fossa. Its anterior part is formed by the anterior cerebral artery, from either side. Anterior communicating artery connects the right and left anterior cerebral arteries. Posteriorly, the basilar artery divides into right and left posterior cerebral arteries and each join to ipsilateral internal carotid artery through a posterior communicating artery. Anterior communicating artery and posterior communicating arteries are important component of circle of Willis, acts as collateral channel to stabilize blood flow. In the present study, anatomical variations in the circle of Willis were noted.Methods: 75 apparently normal formalin fixed brain specimens were collected from human cadavers. 55 Normal anatomical pattern and 20 variations of circle of Willis were studied. The Circles of Willis arteries were then colored, photographed, numbered and the abnormalities, if any, were noted.Results: Twenty variations were noted. The most common variation observed is in the anterior communicating artery followed by some other variations like the Posterior communicating arteries, Anterior cerebral artery and posterior cerebral artery (PCA) was found in 20 specimens.Conclusions: Knowledge on of variations in the formation of Circle of Willis, all surgical interventions should be preceded by angiography. Awareness of these anatomical variations is important in the neurovascular procedures.

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