Kowada M, Kaneko Y, Takahashi M, Goto K
No Shinkei Geka. 1976 Sep;4(9):889-91.
A 44-year-old male entered the hospital following an episode of subarachnoid hemorrhage on January 28, 1975. The left vertebral angiography revealed an anteriovenous malformation in the mesencephalon mainly feeded by the thalamoperforate artery and the medial branch of the posterior choroidal artery. A partial fenestration of the basilar artery was also demonstrated. The patient refused the surgical treatment for the arteriovenous malformation and was discharged on March, 28, 1975. Fenestration of the basilar artery develops by arrested or abnormal development at the first and second stage of the embryological process. Most basilar artery fenestration demonstrated by brain dissection and angiography are cases of a short segment duplication (partial fenestration) while duplication of the entire segment of the basilar artery (complete fenestration) is quite rare. Only six cases of angiographically revealed basilar artery fenestration have been reported so far in the literature. With increasing application of vertebral angiography, this developmental anomaly may be encountered more frequently.
一名44岁男性于1975年1月28日蛛网膜下腔出血后入院。左椎动脉血管造影显示中脑存在动静脉畸形，主要由丘脑穿动脉和脉络膜后内侧支供血。还发现基底动脉有部分开窗。患者拒绝接受动静脉畸形的手术治疗，于1975年3月28日出院。基底动脉开窗是在胚胎发育过程的第一和第二阶段发育停滞或异常所致。通过脑解剖和血管造影显示的大多数基底动脉开窗是短节段重复（部分开窗）的情况，而基底动脉整个节段的重复（完全开窗）则非常罕见。迄今为止，文献中仅报道了6例血管造影显示的基底动脉开窗病例。随着椎动脉血管造影应用的增加，这种发育异常可能会更频繁地遇到。
