Niizuma H, Kwak R, Uchida K
No Shinkei Geka. 1979 Jun;7(6):599-602.
Two cases with azygos anterior cerebral artery were reported from an analysis of 37 cases of distal anterior cerebral artery aneurysm. Case 1 was a 57-year-old woman. She had an attack of subarachnoid hemorrhage two months before admission to our clinic. The anterior cerebral artery was not demonstrated on the right carotid angiogram, and an azygos anterior cerebral artery was visualized on the left carotid angiogram. The aneurysm was situated at the distal end of the azygos artery. Case 2 was a 71-year-old hypertensive woman. Subarachnoid hemorrhage occurred 6 days before admission to our clinic. The left carotid angiography with contraleteral compression revealed an azygos artery and an aneurysm in its middle part. The azygos arteries in both cases were confirmed at operation and aneurysmal necks were managed without any serious deficit. The distal anterior cerebral artery aneurysm is frequently accompanied by azygos artery. This vascular anomaly may cause a hemodynamic change and may be one of the factors of aneurysmal formation at this part.
通过对37例大脑前动脉远端动脉瘤病例的分析，报告了2例奇静脉大脑前动脉病例。病例1为一名57岁女性。入院前两个月她曾发生蛛网膜下腔出血。右侧颈动脉血管造影未显示大脑前动脉，而左侧颈动脉血管造影显示了一条奇静脉大脑前动脉。动脉瘤位于奇静脉远端。病例2是一名71岁的高血压女性。入院前6天发生蛛网膜下腔出血。对侧压迫下的左侧颈动脉血管造影显示一条奇静脉及其中部的一个动脉瘤。两例患者的奇静脉在手术中均得到证实，且动脉瘤颈部的处理未导致任何严重功能缺损。大脑前动脉远端动脉瘤常伴有奇静脉。这种血管异常可能会引起血流动力学改变，可能是该部位动脉瘤形成的因素之一。
