A distal anterior cerebral artery tripod branching to a bihemispheric pericallosal artery

Κalamatianos, Theodosis; Antonopoulos, Ioannis; Piagkou, Maria; Natsis, Konstantinos; Chrissicopoulos, Christos; Stranjalis, George

doi:10.1007/s00276-021-02879-3

Cited by 4 publications

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“…There have been several anatomical definitions for the bihemispheric ACA pattern [ 12 ]. Some authors define it as the one displaying a hypoplastic or early terminating A2 segment with the contralateral A2 providing the major supply of the ACA area in both hemispheres [ 4 , 7 , 19 ].…”

Section: Discussionmentioning

confidence: 99%

“…Some authors define it as the one displaying a hypoplastic or early terminating A2 segment with the contralateral A2 providing the major supply of the ACA area in both hemispheres [ 4 , 7 , 19 ]. In the present study, we used the recent, more inclusive definition proposed by Cilliers and Page [ 8 ] indicating that the bihemispheric pattern is the one displaying branches that originate distal to the first cortical ACA branch to supply the contralateral hemisphere, irrespective of the presence of a hypoplastic or early terminating A2 segment [ 8 , 12 ].…”

Section: Discussionmentioning

confidence: 99%

“…This variant pattern is also described as triple/triplicate ACA and has been postulated to indicate the persistence of the median artery of the corpus callosum, a remnant of the embryonic circulation [ 11 ]. The bihemispheric ACA pattern can be defined as the one displaying branches that originate distal to the first cortical ACA branch to supply the contralateral hemisphere, irrespective of the presence of a hypoplastic or early terminating A2 segment [ 8 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

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The Anatomical Variation of the Distal Anterior Cerebral Artery: An Angiographic Study in a Greek Population Sample

Chrissicopoulos,

Mavrovounis,

Piagkou

et al. 2024

Cureus

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Objective The current retrospective angiographic study establishes the rates of variants in the distal anterior cerebral artery (DACA) in a sample of the Greek population. Methods Data were collected from 456 patients who underwent two-dimensional (2D) or three-dimensional (3D) digital subtraction angiography (DSA) of the carotid and vertebral arteries bilaterally. The study focused on patients with good visualization of the anterior and posterior circulations and employed magnetic resonance (MR) or computed tomography (CT) angiography for 3D reconstruction. The anterior cerebral artery (ACA) was classified into one of its two basic configurations, that is, with or without the callosomarginal artery (CMA). The bihemispheric, median, and azygos ACA patterns were also identified. Results The majority (373/456, 81.8%) exhibited a typical DACA pattern. The bihemispheric, median, and azygos patterns were identified in 66/456 (14.5%), 10/456 (2.2%), and 7/456 (1.5%), respectively. The CMA was present in 824/912 (90.4%) of the hemispheres, with a trend toward male predominance for bilateral presence (males: 167/192, 86.98%; females: 210/264, 79.55%; p = 0.05). In particular, the CMA was present significantly more frequently (p = 0.002) in the left hemispheres of male patients. Gender differences in CMA presence persisted in the analysis of the patients with a typical DACA pattern. Conclusion This study provides insights into the variations of the DACA in the Greek population. The observed gender differences in CMA rates suggest potential morphological variations in cerebral vasculature between males and females and contribute to a better understanding of vascular anatomy for clinical and surgical applications.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Anatomical Variation of the Distal Anterior Cerebral Artery: An Angiographic Study in a Greek Population Sample

Chrissicopoulos,

Mavrovounis,

Piagkou

et al. 2024

Cureus

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“…An azygos ACA is an uncommon anomaly in which the A1 segments of both ACAs unite into a single A2 segment with bilateral distribution, being prone to the formation of aneurysms [ 12 ]. Differently, a bihemispheric ACA (asymmetric ACA) is defined by the combination of one dominant A2 segment supplying most of the cortical territory of both ACAs [ 13 ]. An azygos PCalA leaves an A2 segment to further divide into the left and right PCalAs [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Transcallosal and Pericallosal Courses of the Anterior Cerebral Artery

et al. 2022

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(1) Background: The anterior cerebral artery (ACA) has a precommunicating A1 segment, followed by a postcommunicating A2 segment. Anatomically, after it sends off from the callosomarginal artery (CMA), it continues as the pericallosal artery (PCalA). A detailed pattern of the anatomical variations of the PCalA are needed for practical reasons. (2) Methods: There were 45 retrospectively documented Computed Tomography Angiograms of 32 males and 13 females. (3) Results: In 90 sides, eleven different types of PCalA were documented: type 1: normal origin, above the genu of the corpus callosum (CC) (51.11%); type 2: low origin, below the rostrum of the CC (8.88%); type 3: late origin, above the body of the CC (3.33%); type 4, initial transcallosal course (3.33%); type 5, duplicated PCalA (1.11%); type 6, azygos PCalA (2.22%); type 7, absent PCalA (CMA type of ACA) (7.78%); type 8: CMA continued as PCalA (5.56%); type 9: PCalA continued as the cingular branch (1.11%); type 10: PCalA type of ACA, absent CMA (14.44%); type 11: triple PCalA, with an added median artery of the CC (1.11%). Different types of CMA were also documented: type 0, absent CMA (17.78%); type 1, CMA with frontoparietal distribution (45.56%); type 2, CMA with parietal distribution (22.22%); type 3, low origin of CMA, either from A1, or from A2 (8.88%); type 4, CMA continued as PCalA (5.56%). Ipsilateral combinations of PCalA and CMA types were classified as types A-P. In 33/45 cases (73.3%), the bilateral asymmetry of the combined anatomical patterns of PCalA and CMA was documented. Additional rare variations were found: (a) huge fenestration of A2; (b) bihemispheric ACAs (6/45 cases); (c) twisted arteries within the interhemispheric fissure. (4) Conclusions: The PCalA and CMA are anatomically diverse and unpredictable. Therefore, they should be documented on a case-by-case basis before surgical or endovascular approaches.

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Multiple cerebral arterial variations incidentally detected by magnetic resonance angiography: a case report

Uchino¹,

Nakadate²

2022

Surg Radiol Anat

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A distal anterior cerebral artery tripod branching to a bihemispheric pericallosal artery

Cited by 4 publications

References 12 publications

The Anatomical Variation of the Distal Anterior Cerebral Artery: An Angiographic Study in a Greek Population Sample

The Anatomical Variation of the Distal Anterior Cerebral Artery: An Angiographic Study in a Greek Population Sample

Transcallosal and Pericallosal Courses of the Anterior Cerebral Artery

Multiple cerebral arterial variations incidentally detected by magnetic resonance angiography: a case report

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