Department of Neurosurgery, 117971The First Hospital of Jilin University, Changchun, China.
Interv Neuroradiol. 2022 Oct;28(5):604-612. doi: 10.1177/15910199211049054. Epub 2021 Nov 13.
The anterior inferior cerebellar artery (AICA) is a very slender and anatomically variable artery that gives off many important perforating arteries that feed the brainstem and nerve-related arteries that feed the inner ear and labyrinth. AICA trunk aneurysms are rare entities that are also difficult to manage. At present, endovascular treatment (EVT) is the preferred choice; however, the understanding of EVT for AICA trunk aneurysms is limited.
In this article, we present a literature review on EVT for AICA trunk aneurysms. To promote understanding, we would also provide some illustrative educational cases of our institute.
Aneurysms along the AICA trunk can occur alone (isolated AICA aneurysm) or secondary to cerebrovascular shunts (flow-related AICA aneurysm). According to their anatomical location, they can also be divided into proximal and distal types. At present, EVT is the mainstream treatment, mainly including selective coiling with parent artery preservation and parent artery occlusion. Both coils and liquid embolization materials can be used.
For AICA trunk aneurysms, EVT is a reasonable choice and should be based on the specific anatomical location, pathology, and collateral circulation. However, there is still controversy as to the specific type of treatment that should be chosen.
小脑前下动脉（AICA）是一条非常纤细且解剖结构多变的动脉，它发出许多重要的穿通动脉，为脑干供血，还有神经相关的动脉，为内耳和迷路供血。AICA 干动脉瘤是罕见的实体，也很难处理。目前，血管内治疗（EVT）是首选；然而，对于 AICA 干动脉瘤的 EVT 理解有限。
本文对 AICA 干动脉瘤的 EVT 进行了文献回顾。为了便于理解，我们还提供了我们研究所的一些说明性教育病例。
AICA 干旁的动脉瘤可以单独发生（孤立性 AICA 动脉瘤）或继发于脑血管分流（血流相关 AICA 动脉瘤）。根据其解剖位置，还可以分为近端和远端类型。目前，EVT 是主流治疗方法，主要包括保留载瘤动脉的选择性线圈栓塞和载瘤动脉闭塞。线圈和液体栓塞材料都可以使用。
对于 AICA 干动脉瘤，EVT 是一种合理的选择，应根据具体的解剖位置、病理学和侧支循环情况来决定。然而，对于应该选择哪种具体的治疗方法，仍存在争议。
