Anterior cerebral artery and anterior communicating artery variations: assessment with magnetic resonance angiography

2021 ◽  
Author(s):  
Adem Yokuş ◽  
Nurşen Toprak ◽  
Ali Mahir Gündüz ◽  
Hüseyin Akdeniz ◽  
Zülküf Akdemir ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Anterior Communicating Artery

Bilateral Internal Carotid to Anterior Cerebral Artery Anastomosis with Anterior Communicating Artery Aneurysm: Technical Case Report

2005 ◽  
Vol 57 (suppl_4) ◽  
pp. ONS-E400-ONS-E400 ◽  
Author(s):  
Kaya Kılıç ◽  
Metin Orakdöğen ◽  
Aram Bakırcı ◽  
Zafer Berkman
Keyword(s):  
Case Report ◽  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Cerebral Artery ◽  
Internal Carotid ◽  
Anterior Cerebral Artery ◽  
Artery Aneurysm ◽  
Anterior Communicating Artery

Abstract OBJECTIVE AND IMPORTANCE: The present case report is the first one to report a bilateral anastomotic artery between the internal carotid artery and the anterior communicating artery in the presence of a bilateral A1 segment, fenestrated anterior communicating artery (AComA), and associated aneurysm of the AComA, which was discovered by magnetic resonance angiography and treated surgically. CLINICAL PRESENTATION: A 38-year-old man who was previously in good health experienced a sudden onset of nuchal headache, vomiting, and confusion. Computed tomography revealed a subarachnoid hemorrhage. Magnetic resonance angiography and four-vessel angiography documented an aneurysm of the AComA and two anastomotic vessels of common origin with the ophthalmic artery, between the internal carotid artery and AComA. INTERVENTION: A fenestrated clip, introduced by a left pterional craniotomy, leaving in its loop the left A1 segment, sparing the perforating and hypothalamic arteries, excluded the aneurysm. CONCLUSION: The postoperative course was uneventful, with complete recovery. Follow-up angiograms documented the successful exclusion of the aneurysm. Defining this particular internal carotid-anterior cerebral artery anastomosis as an infraoptic anterior cerebral artery is not appropriate because there is already an A1 segment in its habitual localization. Therefore, it is also thought that, embryologically, this anomaly is not a misplaced A1 segment but the persistence of an embryological vessel such as the variation of the primitive prechiasmatic arterial anastomosis. The favorable outcome for our patient suggests that surgical treatment may be appropriate for many patients with this anomaly because it provides a complete and definitive occlusion of the aneurysm.

scholarly journals Fenestrations of the Basilar Artery Demonstrated on Magnetic Resonance Angiograms: An Analysis of 212 Cases

2013 ◽  
Vol 19 (4) ◽  
pp. 461-465 ◽  
Author(s):  
Keiji Sogawa ◽  
Yoichi Kikuchi ◽  
Toshihiro O'Uchi ◽  
Michihiro Tanaka ◽  
Tomio Inoue
Keyword(s):  
Magnetic Resonance ◽  
Cerebral Artery ◽  
Basilar Artery ◽  
Internal Carotid ◽  
Anterior Cerebral Artery ◽  
Average Length ◽  
Anterior Communicating Artery ◽  
Intracranial Artery ◽  
High Incidence ◽  
Arterial Anomalies

Fenestration of the basilar artery (BA) is a rare variant of the intracranial artery, well demonstrated in autopsy and angiographic studies. Some angiographic series show a high incidence of associated aneurysms at the basilar fenestration site. The purpose of this study is to report the incidence of BA fenestration, its configurations, associated aneurysms, and arterial anomalies in a large series of intracranial MR angiograms (MRAs). A total of 16,416 MRAs were retrospectively reviewed to identify the location, size and associated intracranial arterial anomalies of BA fenestrations. All images were obtained with the time-of-flight (TOF) technique. Of the 16,416 MRAs, 215 fenestrations were found in 212 cases (1.29%). Most fenestrations were located in the proximal BA. The average length of the fenestration was 4.6 mm; the largest was 15.6 mm. No aneurysm was found at the site of the fenestration. Thirteen aneurysms were found in nine cases at locations other than the BA: seven in the middle cerebral artery (MCA), one in the anterior cerebral artery (ACA), one in the anterior communicating artery (Acom), one in the vertebral artery (VA), one at the carotid siphon, and two at the internal carotid-posterior communicating artery (IC-PC). Arterial anomalies in other locations were found in 26 cases. BA fenestrations were found in 1.29% of the 16,416 cases studied. There were no aneurysms at the BA fenestration site. Aneurysms at the BA fenestration site may be an exceedingly rare phenomenon.

scholarly journals Chronic Recanalization of Dissection of the Distal Anterior Cerebral Artery: Case Report and Review of the Literature

2009 ◽  
Vol 2009 ◽  
pp. 1-5
Author(s):  
Shuichiro Asano ◽  
Tetsuo Hara
Keyword(s):  
Case Report ◽  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Acute Stage ◽  
Review Of The Literature ◽  
History Of ◽  
One Year ◽  
Distal Anterior Cerebral Artery

The natural history of atraumatic idiopathic dissection of the distal anterior cerebral artery is still unclear. We present a 38-year-old man who had dissection of the leftA2segment of this vessel associated with subintimal hematoma and infarction. Because of complete stroke in acute stage, he did not undergo surgery. About three months later, administration of aspirin (100 mg/day) was started. At nine months, magnetic resonance angiography revealed complete recanalization of theA2dissection. To assess the outcome of dissection, we should observe the patient for at least one year.

scholarly journals Optimization of post-label delay in single-phase arterial spin labeling (ASL) using multi-phase ASL in four-dimensional magnetic resonance angiography

2019 ◽  
Vol 32 (3) ◽  
pp. 173-178
Author(s):  
Tsuyoshi Oshita ◽  
Hidetake Yabuuchi ◽  
Masanobu Osame
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Cerebral Artery ◽  
Arterial Spin Labeling ◽  
Single Phase ◽  
Anterior Cerebral Artery ◽  
Posterior Cerebral Artery ◽  
Spin Labeling ◽  
Peak Time ◽  
Multi Phase

Purpose To optimize the post-label delay in single-phase arterial spin labeling (SP-ASL) using multi-phase ASL in 4-dimensional magnetic resonance angiography (4D-MRA). Methods Ten healthy volunteers (six men, four women; age range, 24–37 years; mean, 29.1) were enrolled. 4D-MRA and SP-ASL were performed on a 3T magnetic resonance imaging (MRI) scanner. Signal intensities in four cerebral arterial territories (anterior cerebral artery, middle cerebral artery, posterior cerebral artery, and whole area) were measured using both 4D-MRA and SP-ASL, and peak time of maximum intensity through each technique was recorded. Regression analysis was used to determine the correlation between the peak times using 4D-MRA and those using SP-ASL, and the regression function obtained was used to estimate the peak time for SP-ASL (optimum post-label delay) from that obtained for 4D-MRA. Results The peak time in anterior cerebral artery territory for SP-ASL was expressed as 1.19 + 0.30 × (peak time of 4D-MRA) s, ( p = 0.017, r2 = 0.14). The peak time in middle cerebral artery territory for SP-ASL was 0.96 + 0.58 × (peak time of 4D-MRA) s, ( p < 0.001, r2 = 0.32). The peak time in posterior cerebral artery territory for SP-ASL was expressed as 0.92 + 0.58 × (peak time of 4D-MRA) s, ( p < 0.001, r2 = 0.33). The peak time in whole brain for SP-ASL was expressed as 1.04 + 0.46 × (peak time of 4D-MRA) s, ( p < 0.001, r2 = 0.25). Conclusion The peak time values at 4D-MRA showed potential for use in predicting the optimum post-label delay of SP-ASL.

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