Department of Cerebrovascular Surgery, Saitama Medical University International Medical Center, 1397-1 Yamane, Hidaka, Saitama, 350-1298, Japan.
Tachikawa Neurosurgery Clinic, Tsurugashima, Japan.
Acta Neurochir (Wien). 2019 Feb;161(2):403-406. doi: 10.1007/s00701-018-3771-x. Epub 2018 Dec 17.
Intrameatal aneurysms arising from the meatal loop of the anterior inferior cerebellar artery (AICA) are extremely rare.
We report a 60-year-old man presenting with severe vertigo and sudden left hearing loss associated with subarachnoid hemorrhage caused by rupture of a saccular aneurysm arising from the meatal loop of the AICA, which was entirely buried in the meatus. Intraoperatively, we identified the occluded internal auditory artery arising from the meatal loop of the AICA, where the aneurysm originated, and performed neck clipping.
These findings suggest that internal auditory artery occlusion is a potential cause of loss of auditory and vestibular functions.
发自小脑前下动脉（AICA）内听道口环的内听道动脉瘤极其罕见。
我们报告一例 60 岁男性，因囊状动脉瘤破裂导致蛛网膜下腔出血而出现严重眩晕和突发性左侧听力丧失，该动脉瘤起自发自 AICA 内听道口环的完全埋藏在内听道内的 AICA。术中，我们发现起源于动脉瘤的 AICA 内听道口环闭塞的内听动脉，并进行了颈内动脉夹闭。
这些发现提示内听动脉闭塞是听觉和前庭功能丧失的潜在原因。
