The Fetal Type of Posterior Cerebral Artery

Davidoiu, Ana-Maria; Mincă, Dragoş Ionuţ; Rusu, Mugurel Constantin; Hostiuc, Sorin; Toader, Corneliu

doi:10.3390/medicina59020231

Cited by 12 publications

(10 citation statements)

References 40 publications

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“…Key Words: Hair follicle, hairline, congenital deformity, hair transplantation C utis verticis gyrata is a rare disease that causes multiple furrows and folds of the scalp. [1][2][3] It was first defined by Robert in 1843, then later further classified as either primary or secondary by Polan and Butterworth. 4 However, the cases reported here differ from cases of CVG and appear consistent with a new form of the congenital disorder that has not yet, to our knowledge, been reported.…”

Section: Discussionmentioning

confidence: 99%

“…2 The ICA is united with the PCA by the posterior communicating artery (PComA). 3 The anterior communicating artery (AComA) unites the ACAs. 3 Undoubtfully, diverse anatomical variations modify the common anatomical structure of the circle of Willis.…”

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confidence: 99%

“…3 The anterior communicating artery (AComA) unites the ACAs. 3 Undoubtfully, diverse anatomical variations modify the common anatomical structure of the circle of Willis. 4 It is hereby reported a case with rare variations of the ACA, PCA, and BA.…”

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confidence: 99%

“…The internal carotid artery (ICA) contributes the anterior choroidal artery (AChA), anterior cerebral artery (ACA), and middle cerebral artery (MCA) 2 . The ICA is united with the PCA by the posterior communicating artery (PComA) 3 . The anterior communicating artery (AComA) unites the ACAs 3 …”

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confidence: 99%

“…The ICA is united with the PCA by the posterior communicating artery (PComA) 3 . The anterior communicating artery (AComA) unites the ACAs 3 …”

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confidence: 99%

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Bihemispheric Right Anterior Cerebral Artery, Fenestrated Origin of the Left Pericallosal Artery, Fenestrated Basilar Artery, Double Right Posterior Cerebral Artery

Rusu

Lazăr

Vrapciu

2023

Journal of Craniofacial Surgery

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Anatomical variations of the cerebral vasculature are frequently encountered. The archived magnetic resonance angiogram of a 62-year-old male patient was studied anatomically on planar slices and 3-dimensional volume renderings. Numerous anatomical variants were found in that single case. In the vertebrobasilar system were found: the proximal basilar artery fenestration, with a unilateral origin from that fenestration of an anterior inferior cerebellar artery, and the unilateral origin of the superior cerebellar artery from the P1 segment of the main posterior cerebral artery (PCA). There were also unilateral variants of the right internal carotid artery (ICA): a subvariant of an accessory PCA leaving the ICA as a hyperplastic anterior choroidal artery and united to the main PCA by a short communicating branch, distinctive of the posterior communicating artery in that side (unilateral double PCA); a right bihemispheric anterior cerebral artery (ACA) but with complete agenesis of the contralateral A1 ACA segment; from the right ACA continued an anatomically normal ipsilateral A2 segment and a short transverse contralateral A2 that, in turn, sent off long pericallosal and callosomarginal arteries; and fenestrated origin of the left pericallosal artery. Therefore, an arterial variant in one of the main cerebral circulations could not exclude anatomical variants in the other cerebral circulatory beds.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

“…The ICA is united with the PCA by the posterior communicating artery (PComA) 3 . The anterior communicating artery (AComA) unites the ACAs 3 …”

mentioning

confidence: 99%

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Bihemispheric Right Anterior Cerebral Artery, Fenestrated Origin of the Left Pericallosal Artery, Fenestrated Basilar Artery, Double Right Posterior Cerebral Artery

Rusu

Lazăr

Vrapciu

2023

Journal of Craniofacial Surgery

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Anatomical evaluation of P1 segment of posterior cerebral artery and posterior communicanting artery in 340 human hemispheres: a proposal for morphological classification

Nas,

Nteli Chatzioglou,

Gayretli

2024

Surg Radiol Anat

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The aim of our study is to examine the morphometry of the P1 segment of the posterior cerebral artery (P1) and the posterior communicating artery (PcomA) and to present a descriptive classi cation according to morphometric ndings. Methods 340 hemispheres from 170 cadavers were included. The outer diameters of P1 and PcomA were measured with ImageJ software. Then, the con gurations of the posterior cerebral artery were revealed as fetal, adult and transitional. The ndings were correlated with the demographic information of the cadavers such as gender, body mass index (BMI), age. ResultsAccording to the morphometric ndings, 83.75%, 13.85% and 2.40% of the posterior cerebral arteries were found to be adult, fetal and transitional, respectively. The fetal type was more common in cadavers aged 60 years and older (13.73%) compared to the 18-39 and 40-59 age groups. In addition, P1 and PcomA diameters also increased with age. Fetal and transtional types showed a similar low distribution in people with low (< 18.5), normal (18.5-24.9), overweight (25-29.9) and obese (> 30) BMI, whereas adult type was found in cadavers with a normal BMI of 140/303. ConclusionWe believe that the ndings of our study will contribute to the planning of neurointerventional procedures, the development of endovascular devices, the success of invasive procedures and the reduction of complications.

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Assessing the impact of fetal-type posterior cerebral artery variations on cerebral hemodynamics

Le,

Ryu,

Yoon

et al. 2024

Physics of Fluids

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The circle of Willis (CoW) is a critical, arterial structure that ensures balanced, cerebral-blood supply. The fetal-type posterior cerebral artery (f-PCA) is a CoW variant that can significantly affect hemodynamics and elevate the risk of cerebrovascular diseases. This study used computational fluid dynamics simulations and a patient-specific, three-dimensional model to evaluate the hemodynamic effects of the f-PCA variants on cerebral-blood flow and key hemodynamic indices—such as time-averaged wall-shear stress (TAWSS), oscillatory shear index (OSI), pulsatility index, and resistive index. The fetal ratio (FR) is defined as the ratio of the diameter of the posterior communicating artery (PCoA) to that of the first segment (P1) of the PCA. Our findings indicate that as the FR increases, the contribution of the basilar artery to the second segment (P2) of PCA decreases significantly. Specifically, the flow rate through ipsilateral P1 decreased by 40.0% for FR = 1 and 70.9% for FR = 2, with the internal carotid artery (ICA) compensating for this reduction. Moreover, variations in f-PCA led to significant increases in TAWSS and OSI in key arterial segments (including the ipsilateral P1, PCoA, and the anterior communicating artery), which are associated with a higher risk of aneurysm initiation and growth. Under conditions of unilateral stenosis in the ipsilateral ICA, f-PCA models exhibit a more complex and pronounced impact on blood flow than models without f-PCA, emphasizing the need for detailed hemodynamic assessments in clinical evaluations and preoperative planning to mitigate the risks associated with CoW anatomical variations.

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The Fetal Type of Posterior Cerebral Artery

Cited by 12 publications

References 40 publications

Bihemispheric Right Anterior Cerebral Artery, Fenestrated Origin of the Left Pericallosal Artery, Fenestrated Basilar Artery, Double Right Posterior Cerebral Artery

Bihemispheric Right Anterior Cerebral Artery, Fenestrated Origin of the Left Pericallosal Artery, Fenestrated Basilar Artery, Double Right Posterior Cerebral Artery

Anatomical evaluation of P1 segment of posterior cerebral artery and posterior communicanting artery in 340 human hemispheres: a proposal for morphological classification

Assessing the impact of fetal-type posterior cerebral artery variations on cerebral hemodynamics

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