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Intracranial arterial variations: A comprehensive evaluation using CT angiography

BACKGROUND: Intracranial arterial variations are a frequent finding in the general population. Knowledge of these vascular variations has significant clinical impact because some of them predispose patients to development of an aneurysm or cerebrovascular ischemic disease. The purpose of this study...

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Autores principales: Kovač, Jelena Djokić, Stanković, Ana, Stanković, Danilo, Kovač, Bojan, Šaranović, Djordjije
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Scientific Literature, Inc. 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3962325/
https://www.ncbi.nlm.nih.gov/pubmed/24625840
http://dx.doi.org/10.12659/MSM.890265
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author Kovač, Jelena Djokić
Stanković, Ana
Stanković, Danilo
Kovač, Bojan
Šaranović, Djordjije
author_facet Kovač, Jelena Djokić
Stanković, Ana
Stanković, Danilo
Kovač, Bojan
Šaranović, Djordjije
author_sort Kovač, Jelena Djokić
collection PubMed
description BACKGROUND: Intracranial arterial variations are a frequent finding in the general population. Knowledge of these vascular variations has significant clinical impact because some of them predispose patients to development of an aneurysm or cerebrovascular ischemic disease. The purpose of this study was to evaluate the frequency of intracranial vascular variations and associated vascular lesions on computed tomography angiography (CTA) examinations. MATERIAL/METHODS: CTA examinations performed by 16-detector computed tomography were prospectively reviewed in 455 patients for the presence of fenestrations, duplications, hypoplasia, aplasia, aneurysms, and other vascular lesions. RESULTS: Arterial fenestrations were found in 2.4% of patients, with the vertebrobasilar system as the most common location. The remaining fenestrations were located on the middle cerebral artery M1 segment (0.2%), anterior communicating artery (0.4%), and anterior cerebral artery A1 segment (0.6%). No associated aneurysms were noted in these patients. The prevalence of an azygos anterior cerebral artery was 1.5%. Bihemispheric anterior cerebral artery was found in 0.9%, hypoplastic A1 segment in 17.6%, and congenital absence of A1 segment in 0.4% of patients. Fetal origin of the posterior cerebral artery was found in 37% of cases. Hypoplastic vertebral artery terminating as posterior inferior cerebellar artery was observed in 9 patients, while transversal anastomosis between vertebral arteries was seen in only 1 patient. CONCLUSIONS: CTA precisely demonstrates the diversity of intracranial arterial variations, whose overall frequency in this study is similar to previous radiological reports. Furthermore, our results do not show significant association between the frequency of aneurysms and cerebral arterial anomalies.
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spelling pubmed-39623252014-03-24 Intracranial arterial variations: A comprehensive evaluation using CT angiography Kovač, Jelena Djokić Stanković, Ana Stanković, Danilo Kovač, Bojan Šaranović, Djordjije Med Sci Monit Diagnostic Techniques BACKGROUND: Intracranial arterial variations are a frequent finding in the general population. Knowledge of these vascular variations has significant clinical impact because some of them predispose patients to development of an aneurysm or cerebrovascular ischemic disease. The purpose of this study was to evaluate the frequency of intracranial vascular variations and associated vascular lesions on computed tomography angiography (CTA) examinations. MATERIAL/METHODS: CTA examinations performed by 16-detector computed tomography were prospectively reviewed in 455 patients for the presence of fenestrations, duplications, hypoplasia, aplasia, aneurysms, and other vascular lesions. RESULTS: Arterial fenestrations were found in 2.4% of patients, with the vertebrobasilar system as the most common location. The remaining fenestrations were located on the middle cerebral artery M1 segment (0.2%), anterior communicating artery (0.4%), and anterior cerebral artery A1 segment (0.6%). No associated aneurysms were noted in these patients. The prevalence of an azygos anterior cerebral artery was 1.5%. Bihemispheric anterior cerebral artery was found in 0.9%, hypoplastic A1 segment in 17.6%, and congenital absence of A1 segment in 0.4% of patients. Fetal origin of the posterior cerebral artery was found in 37% of cases. Hypoplastic vertebral artery terminating as posterior inferior cerebellar artery was observed in 9 patients, while transversal anastomosis between vertebral arteries was seen in only 1 patient. CONCLUSIONS: CTA precisely demonstrates the diversity of intracranial arterial variations, whose overall frequency in this study is similar to previous radiological reports. Furthermore, our results do not show significant association between the frequency of aneurysms and cerebral arterial anomalies. International Scientific Literature, Inc. 2014-03-14 /pmc/articles/PMC3962325/ /pubmed/24625840 http://dx.doi.org/10.12659/MSM.890265 Text en © Med Sci Monit, 2014 This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License
spellingShingle Diagnostic Techniques
Kovač, Jelena Djokić
Stanković, Ana
Stanković, Danilo
Kovač, Bojan
Šaranović, Djordjije
Intracranial arterial variations: A comprehensive evaluation using CT angiography
title Intracranial arterial variations: A comprehensive evaluation using CT angiography
title_full Intracranial arterial variations: A comprehensive evaluation using CT angiography
title_fullStr Intracranial arterial variations: A comprehensive evaluation using CT angiography
title_full_unstemmed Intracranial arterial variations: A comprehensive evaluation using CT angiography
title_short Intracranial arterial variations: A comprehensive evaluation using CT angiography
title_sort intracranial arterial variations: a comprehensive evaluation using ct angiography
topic Diagnostic Techniques
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3962325/
https://www.ncbi.nlm.nih.gov/pubmed/24625840
http://dx.doi.org/10.12659/MSM.890265
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