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.

scholarly journals A Review of the Circle of Willis: Investigative Methods, Anatomical Variations and Correlated Ischemic Brain Diseases

2020 ◽  
Vol 33 (2) ◽  
pp. 159-166
Author(s):  
Wei Wang ◽  
◽  
Qiudian Wang ◽  
Guanying Yang ◽  
Mingrui Qiu ◽  
...  
Keyword(s):  
Anatomical Variations ◽  
Circle Of Willis ◽  
Brain Diseases ◽  
Ischemic Brain

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.

Anatomical Variations in Termination of the Axillary Artery and its Clinical Implications

2004 ◽  
Vol 44 (1) ◽  
pp. 61-66 ◽  
Author(s):  
S K PANDEY ◽  
A N GANGOPADHYAY ◽  
S K TRIPATHI ◽  
V K SHUKLA
Keyword(s):  
Axillary Artery ◽  
Anatomical Variations ◽  
Clinical Implications

scholarly journals A Radiological Study of Anatomical Variations of Uncinate Process

2016 ◽  
Vol 9 (2) ◽  
pp. 59-61
Author(s):  
Shrinath D Kamath Patla ◽  
Pretty Rathnakar ◽  
Vadisha S Bhat ◽  
Jayaramesh LNU
Keyword(s):  
Clinical Significance ◽  
Paranasal Sinuses ◽  
Intraoperative Complications ◽  
Anatomical Variations ◽  
Uncinate Process ◽  
Ct Scans ◽  
Radiological Study ◽  
Lamina Papyracea ◽  
Endoscopic Surgeon ◽  
Coronal Section

ABSTRACT Aim (a) To study the variations in the superior attachment of uncinate process. (b) Incidence of pneumatization of uncinate process was also studied. Materials and methods A total 200 sides of 100 CT scans of paranasal sinuses coronal section were studied for variations in the superior insertion of uncinate process using Landsberg and Friedman classification. Incidence of pneumatization of uncinate process was also studied. Results In our study out of 200 sides, type 6 attachment was commonest (41%) followed by types 1 and 2. Pneumatization of the uncinate was seen in very small percentage of cases. Conclusion Lateral insertion of uncinate (lamina papyracea + aggar nassi) is the commonest variant followed by the insertion into the skulbase. Pneumatization of uncinate is rare. Clinical significance Though the inferior attachment of the uncinate is almost constant the superior attachment has several variations, the knowledge of which is very important for the endoscopic surgeon to avoid intraoperative complications. How to cite this article Patla SDK, Rathnakar P, Bhat VS, Jayaramesh. A Radiological Study of Anatomical Variations of Uncinate Process. Clin Rhinol An Int J 2016;9(2):59-61.

scholarly journals PERFORATION OF INFERIOR ALVEOLAR NERVE BY MAXILLARY ARTERY. Perforation of inferior alveolar nerve by maxillary artery

2016 ◽  
Vol 3 (3) ◽  
pp. 124-129
Author(s):  
Prakash B Billakanti
Keyword(s):  
Infratemporal Fossa ◽  
Maxillofacial Surgery ◽  
Inferior Alveolar Nerve ◽  
Anatomical Variations ◽  
Clinical Implications ◽  
Maxillary Artery ◽  
Foramen Ovale ◽  
Anesthetic Agents ◽  
Male Cadaver ◽  
Anatomical Area

La fosa infratemporal es un área anatómica clínicamente importante para la administración de agentes anestésicos locales en odontología y cirugía maxilofacial. Fueron estudiadas variaciones en la anatomía del nervio alveolar inferior y la arteria maxilar en la disección infratemporal. Durante la disección rutinaria de la cabeza en el cadáver de un varón adulto, fue observada una variación excepcional en el origen del nervio alveolar inferior y su relación con las estructuras circundantes. El nervio alveolar inferior se originaba en el nervio mandibular por dos raíces y la primera parte de la arteria maxilar estaba incorporada entre ambas. El origen embriológico de esta variación y sus implicaciones clínicas es debatido. Dado que la arteria maxilar transcurría entre las dos raíces del nervio alveolar inferior, y el nervio estaba fijado entre el foramen oval y el foramen mandibular, el atrapamiento vásculo-nervioso pudo causar entume-cimiento o dolor de cabeza e interferir con la inyección de anestésicos locales en la fosa infratemporal.  Variaciones anatómicas en esta región deben ser tenidas en cuenta, especialmente en casos de tratamiento fallido de neuralgia del trigémino. Infratemporal fossa is clinically important anatomical area for the delivery of local anesthetic agents in dentistry and maxillofacial surgery. Variations in the anatomy of the inferior alveolar nerve and maxillary artery were studied in infratemporal dissection. During routine dissection of the head in an adult male cadaver an unusual variation in the origin of the inferior alveolar nerve and its relationship with the surrounding structures was observed. The inferior alveolar nerve originated from the mandibular nerve by two roots and the first part of the maxillary artery was incorporated between them. An embryologic origin of this variation and its clinical implications is discussed. Because the maxillary artery runs between the two roots of the inferior alveolar nerve, and the nerve was fixed between the foramen ovale and mandibular foramen, neurovascular entrapment may cause pain numbness or headache and may interfere with the injection of local anesthetics into the infratemporal fossa. Anatomical variations in this region should be kept in mind, particularly in cases of failed treatment of trigeminal neuralgia.

scholarly journals Anatomical Variations of Foramen Transversarium of 7th Cervical Vertebrae and Its Clinical Significance

2020 ◽  
Vol 11 (3) ◽  
pp. 4902-4907
Author(s):  
Manoj P Ambali ◽  
Surekha D Jadhav
Keyword(s):  
Clinical Significance ◽  
Cervical Vertebrae ◽  
Anatomical Variations ◽  
Different Types ◽  
Cervical Approach ◽  
Present Evaluation ◽  
Symmetry Number ◽  
Over The Top

Cervical vertebrae have a cardinal part that is a closeness of and through it passes the vertebral course, vertebral vein and sharp plexus of nerves. The vertebral course enters the of C6 and this way, the FT of C7, which transmits just the vein and nerve, might be near nothing or even occasionally absent. A vertebral channel may enter through C7 in 2% cases as necessities be combinations of this may affect the anatomical course of vascular and neural structures, and this way may cause over the top conditions. The explanation behind the investigation was to watch the anatomical mixes in the of seventh cervical vertebrae. Present work was carried on 156 dry seventh cervical vertebrae of cloud sex and age. We observed each for shape, symmetry, number or accessory and spicules. We observed nine different types of shape of . Round shapes of were present in 28.75 %, accessory in 28.84% and spicules in 12.17 % of vertebrae also noted incomplete FT in 5 vertebrae. Disclosures of present evaluation may be helpful for a radiologist in the comprehension of X-segments, dealt with and scans for spine specialists in preoperative arranging and for blocking injury of a vertebral vessel near to sharp nerves during the careful cervical approach.

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