Dual fenestration of the A1 and azygos A2 segments of the anterior cerebral artery illustrated by Magnetic Resonance Imaging.

IF 1.4 4区医学 Q2 Medicine

Surgical and Radiologic Anatomy Pub Date : 2025-05-05 DOI:10.1007/s00276-025-03645-5

Marialuisa Zedde, Rosario Pascarella

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引用次数: 0

Abstract

Purpose: Fenestrations are probably the most common among the anomalies of intracranial arteries. They are known for their association with other vascular conditions, such as aneurysms and arterio-venous malformations. Anterior cerebral artery (ACA) in both A1 and A2 segments is subjected to many anomalies, including fenestrations, but they are rarer than hypoplasia and aplasia. The association of more than one anomaly has been described, but the presence of a dual fenestration in a single arterial segment has been anecdotally reported.

Methods: A case of an incidentally discovered association of two ACA anomalies, i.e. dual fenestration in the A1 segment and azygos pattern in the A2 segment, is presented. Both anomalies were identified in a brain Magnetic Resonance Imaging (MRI) study with MR Angiography. The clinical indication for MRI was tinnitus. The other intracranial arteries were unremarkable (apart from duplicated posterior communicating arteries) and the brain parenchyma did not show abnormalities. No aneurysms were found.

Conclusions: The reported anomalies (the dual fenestration and the azygos A2 ACA) are located in the same arterial territory and potentially have a long-term effect on the local hemodynamics of the ACA facilitating the formation of aneurysms. Then, an imaging follow-up may be adviced.

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磁共振成像显示大脑前动脉A1段和奇侧A2段双开窗。

目的：开窗可能是颅内动脉异常中最常见的一种。众所周知，它们与其他血管疾病有关，如动脉瘤和动静脉畸形。A1和A2段的大脑前动脉（ACA）有许多异常，包括开窗，但它们比发育不全和发育不全更罕见。不止一种异常的关联已被描述，但在单一动脉段存在双开窗的轶事报道。方法：一个偶然发现的两个ACA异常的关联，即A1段的双开窗和A2段的奇偶模式，被提出。这两种异常都是在脑磁共振成像（MRI）研究中发现的。MRI的临床指征为耳鸣。除重复的后交通动脉外，其他颅内动脉未见明显变化，脑实质未见异常。未发现动脉瘤。结论：所报道的畸形（双开窗和奇静脉A2 ACA）位于同一动脉区域，可能对ACA局部血流动力学产生长期影响，促进动脉瘤的形成。然后，可能建议进行影像学随访。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Surgical and Radiologic Anatomy Medicine-Pathology and Forensic Medicine

CiteScore

2.40

自引率

14.30%

发文量

期刊介绍： Anatomy is a morphological science which cannot fail to interest the clinician. The practical application of anatomical research to clinical problems necessitates special adaptation and selectivity in choosing from numerous international works. Although there is a tendency to believe that meaningful advances in anatomy are unlikely, constant revision is necessary. Surgical and Radiologic Anatomy, the first international journal of Clinical anatomy has been created in this spirit. Its goal is to serve clinicians, regardless of speciality-physicians, surgeons, radiologists or other specialists-as an indispensable aid with which they can improve their knowledge of anatomy. Each issue includes: Original papers, review articles, articles on the anatomical bases of medical, surgical and radiological techniques, articles of normal radiologic anatomy, brief reviews of anatomical publications of clinical interest. Particular attention is given to high quality illustrations, which are indispensable for a better understanding of anatomical problems. Surgical and Radiologic Anatomy is a journal written by anatomists for clinicians with a special interest in anatomy.