大脑前动脉A1段动脉瘤与永存原始嗅动脉相关
Aneurysm of the A1 Segment of the Anterior Cerebral Artery Associated with the Persistent Primitive Olfactory Artery.
作者信息
Sato Yuiko, Kashimura Hiroshi, Takeda Masaru, Chida Kohei, Kubo Yoshitaka, Ogasawara Kuniaki
机构信息
Department of Neurosurgery, Iwate Prefectural Chubu Hospital, Kitakami, Iwate, Japan.
Department of Neurosurgery, Iwate Prefectural Chubu Hospital, Kitakami, Iwate, Japan.
出版信息
World Neurosurg. 2015 Dec;84(6):2079.e7-9. doi: 10.1016/j.wneu.2015.08.017. Epub 2015 Aug 24.
BACKGROUND
The persistent primitive artery constitutes the anterior cerebral artery proper. When the persistent primitive artery keeps its embryologic course along the olfactory bulb, it is called the persistent primitive olfactory artery (PPOA).
CASE DESCRIPTION
A 69-year-old man presented with an incidentally discovered unruptured aneurysm at the origin of the PPOA. The PPOA originated at the A1 segment of the anterior cerebral artery, coursed anteromedially along the olfactory tract, made a hairpin turn posterosuperior to the midline, and formed the callosomarginal branch of the anterior cerebral artery. The anomalous artery was interpreted as a PPOA (type 3). Type 3 PPOA associated with an unruptured aneurysm is rare.
CONCLUSIONS
There is a high incidence of aneurysms associated with a PPOA. Follow-up studies are necessary in the present case to monitor for the development of another aneurysm at the hairpin bend.
背景
永存原始动脉构成大脑前动脉主干。当永存原始动脉沿嗅球保持其胚胎学走行时，称为永存原始嗅动脉（PPOA）。
病例描述
一名69岁男性偶然发现PPOA起始处有未破裂动脉瘤。PPOA起源于大脑前动脉A1段，沿嗅束向前内侧走行，在中线后上方呈发夹样转弯，形成大脑前动脉的胼周支。该异常动脉被判定为PPOA（3型）。3型PPOA合并未破裂动脉瘤较为罕见。
结论
PPOA相关动脉瘤的发生率较高。本病例有必要进行随访研究，以监测发夹样转弯处是否出现另一个动脉瘤。
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