scholarly journals Thrombosis of the Azygos Anterior Cerebral Artery

2017 ◽  
Vol 2017 ◽  
pp. 1-3 ◽  
Author(s):  
Camila Soares Moreira de Sousa ◽  
Carla Lorena Vasques Mendes de Miranda ◽  
Marcelo Coelho Avelino ◽  
Breno Braga Bastos ◽  
Rafael Soares Moreira de Sousa ◽  
...  
Keyword(s):  
Rare Variant ◽  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Anatomical Variation ◽  
Anterior Communicating Artery ◽  
Functional Consequences ◽  
Interhemispheric Fissure

The azygos anterior cerebral artery is a rare variant, characterized by the absence of the anterior communicating artery and the union of two proximal segments of the anterior cerebral artery, forming a single trunk and ascending through the interhemispheric fissure. The incidence in the population varies from 0.3 to 2%. The presence of occlusion for this vessel causes bifrontal infarcts, with potentially devastating functional consequences, hence the importance of recognizing this anatomical variation in imaging exams.

The azygos anterior cerebral artery bypass: double reimplantation technique for giant anterior communicating artery aneurysms

2011 ◽  
Vol 114 (4) ◽  
pp. 1154-1158 ◽  
Author(s):  
Zaman Mirzadeh ◽  
Nader Sanai ◽  
Michael T. Lawton
Keyword(s):  
Radial Artery ◽  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Artery Bypass ◽  
Anterior Communicating Artery ◽  
Retrograde Flow ◽  
Radial Artery Graft ◽  
Pterional Craniotomy ◽  
Artery Graft ◽  
Interhemispheric Fissure

The authors introduce the azygos anterior cerebral artery (ACA) bypass as an option for revascularizing distal ACA territories, as part of a strategy to trap giant anterior communicating artery (ACoA) aneurysms. In this procedure, the aneurysm is exposed with an orbitozygomatic-pterional craniotomy and distal ACA vessels are exposed with a bifrontal craniotomy. The uninvolved contralateral A2 segment of the ACA serves as a donor vessel for a short radial artery graft. The contralateral pericallosal artery (PcaA) and the callosomarginal artery (CmaA) are connected to the graft in the interhemispheric fissure using the double reimplantation technique. Three anastomoses create an azygos system supplying the entire ACA territory, enabling the surgeon to trap the aneurysm incompletely. Retrograde flow from the CmaA supplies the ipsilateral recurrent artery of Heubner, and the aneurysm lumen thromboses. The azygos bypass was successfully performed to treat a 47-year-old woman with a giant, thrombotic ACoA aneurysm supplied by the A1 segment of the left ACA, with left PcaA and CmaA originating from the aneurysm base. The authors conclude that the azygos ACA bypass is a novel option for revascularizing PcaA and CmaA, as part of the overall treatment of giant ACoA aneurysms.

scholarly journals Anterior communicating artery duplication associated with a triplication of anterior cerebral artery – A rare anatomical variation

2020 ◽  
Vol 11 ◽  
pp. 36
Author(s):  
Francisco Matos Ureña ◽  
Jose Gregorio Matos Ureña ◽  
Saul Almeida ◽  
Nícollas Nunes Rabelo ◽  
Mauricio Mandel ◽  
...  
Keyword(s):  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Anatomical Variation ◽  
Anatomical Variations ◽  
Neurological Deficits ◽  
Systemic Hypertension ◽  
Prior History ◽  
Anterior Communicating Artery ◽  
Fisher Grade ◽  
Angio Ct

Background: The anterior communicating artery complex may presente several anatomical variations, and many abnormalities have been reported in radiologiacal and cadaveric studies. Case Description: The authors present a case of a 44-year-old Caucasian female, with a prior history of smoking and arterial systemic hypertension, admitted in the emergency department complaining of a sudden headache, nausea, and vomiting followed by tonic-clonic seizures. Computerized tomography (CT) and angiography (angio- CT) were carried out and showed Fisher Grade IV subarachnoid hemorrhage. Angio-CT revealed an anterior communicating artery (AComA) aneurysm. Minimally invasive craniotomy and microsurgical clipping were performed uneventfully. An unusual anatomical variation of the AComA complex characterized by duplication of the AComA associated with a triplication of anterior cerebral artery (ACA) was observed. The patient was discharged with no neurological deficits. Concluision: This unique anatomical variation of the AComA-ACA complex constitute risck factors for development and rupture of aneurysms.

scholarly journals Nonsaccular aneurysms of the azygos anterior cerebral artery

2004 ◽  
Vol 17 (5) ◽  
pp. 1-5 ◽  
Author(s):  
Kurtis I. Auguste ◽  
Marcus L. Ware ◽  
Michael T. Lawton
Keyword(s):  
Rare Variant ◽  
Cerebral Artery ◽  
Retrospective Review ◽  
Anterior Cerebral Artery ◽  
Anterior Communicating Artery ◽  
Type I ◽  
Base Complex ◽  
Broad Base ◽  
Morphological Distinction ◽  
Clip Occlusion

Object The azygos or undivided anterior cerebral artery (ACA) is a rare variant, and aneurysms associated with this variant are particularly rare. Most reported azygos ACA aneurysms are saccular, but the authors encountered four patients with this variant who had nonsaccular aneurysms. A review of the management of these lesions and this morphological distinction is presented. Methods A retrospective review of patients with aneurysms treated over a 6-year period identified five Type I (according to the Baptista classification) azygos ACA lesions, of which four were nonsaccular. Aneurysms associated with other ACA variants (Baptista Types II and III) were excluded. Azygos ACA aneurysms accounted for 0.5% of all treated lesions and 1.7% of all ACA and anterior communicating artery aneurysms. One lesion in this series was located proximally at the azygos ACA origin, and three were located distally. All four aneurysms were large (>10 mm in diameter), and two were thrombotic. All aneurysms were treated with microsurgical clip occlusion. Conclusions Azygos ACA aneurysms are rare, and may have unusual nonsaccular anatomy (for example, fusiform shape, broad base, complex branching, and/or thrombus in the lumen). The nonsaccular morphology of these aneurysms may render them unsuitable for endovascular coil placement, and may complicate their microsurgical management.

Occlusion of an “accessory” distal anterior cerebral artery during treatment of anterior communicating artery aneurysms

1991 ◽  
Vol 74 (1) ◽  
pp. 133-135 ◽  
Author(s):  
Kevin Gibbons ◽  
Leo N. Hopkins ◽  
Roberto C. Heros
Keyword(s):  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Anterior Communicating Artery ◽  
Case Histories ◽  
Content Type ◽  
Anterior Communicating Artery Aneurysms ◽  
Artery Segment ◽  
Distal Anterior Cerebral Artery ◽  
Clip Occlusion ◽  
Fine Print

✓ Two cases are presented in which clip occlusion of a third distal anterior cerebral artery segment occurred during treatment of anterior communicating artery aneurysms. Case histories, angiograms, operative descriptions, and postmortem findings are presented. The incidence of this anomalous vessel is reviewed. Preoperative and intraoperative vigilance in determining the presence of this anomaly prior to clip placement is emphasized.

Analysis of Anterior Cerebral Artery Tortuosity: Association with Anterior Communicating Artery Aneurysm Rupture

2019 ◽  
Vol 122 ◽  
pp. e480-e486 ◽  
Author(s):  
Roger M. Krzyżewski ◽  
Kornelia M. Kliś ◽  
Borys M. Kwinta ◽  
Małgorzata Gackowska ◽  
Krzysztof Stachura ◽  
...  
Keyword(s):  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Artery Aneurysm ◽  
Aneurysm Rupture ◽  
Anterior Communicating Artery ◽  
Anterior Communicating Artery Aneurysm

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.

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