Hong S K
Department of Neurosurgery, Seoul Red Cross Hospital, Korea.
J Korean Med Sci. 1997 Dec;12(6):576-80. doi: 10.3346/jkms.1997.12.6.576.
Cerebral aneurysms are occasionally associated with anomalies of cerebral arteries, that should be recognized pre- and intra-operatively. Most of the previous reports on the anomalies of the anterior cerebral artery have been concerned with hypoplasia, fenestration, and infra-optic course of the A1, variant A1 perforators or Heubner's artery, multi-channeled anterior communicating artery, and azygos anterior cerebral artery. The author experienced a patient with a ruptured proximal anterior cerebral artery (A1) aneurysm located at an anomalous origin of the fronto-orbital artery from the A1. The fronto-orbital artery normally branches off the anterior cerebral artery just distal to the anterior communicating artery (proximal A2). An anomalous branching of the fronto-orbital artery off the A1 seems very rare. This anomalous artery could be mistaken for an unusually large medial lenticulostriate artery, aberrant frontopolar artery, or the third A2. The author reviewed the literature on anomalies of the A1 and the fronto-orbital artery.
脑动脉瘤偶尔与脑动脉异常相关，术前和术中均应予以识别。既往关于大脑前动脉异常的大多数报告都涉及A1段发育不全、开窗、A1段穿支或Heubner动脉的视交叉下走行、变异的A1段穿支、多通道前交通动脉以及奇静脉大脑前动脉。作者遇到一名患者，其大脑前动脉近端（A1段）动脉瘤破裂，该动脉瘤位于眶额动脉从A1段发出的异常起始处。眶额动脉通常在大脑前动脉前交通动脉（近端A2段）远端分支。眶额动脉从A1段异常分支似乎非常罕见。这条异常动脉可能被误认为是异常粗大的内侧豆纹动脉、异常的额极动脉或第三支A2段。作者回顾了关于A1段和眶额动脉异常的文献。
