Milenković Z
J Neurosurg. 1981 Nov;55(5):701-3. doi: 10.3171/jns.1981.55.5.0701.
A rare vascular anomaly was found in a 21-week-old fetal brain. It consisted of an anastomotic loop between the internal carotid artery and the anterior cerebral artery. Other variations and anomalies were also found. Anomalies and variations of the circle of Willis are probably genetically determined and develop at an early embryonic stage. They are frequently found in association with other cerebrovascular diseases, such as aneurysms.
在一名21周大的胎儿大脑中发现了一种罕见的血管异常。它由颈内动脉和大脑前动脉之间的一个吻合环组成。还发现了其他变异和异常情况。 Willis环的异常和变异可能是由基因决定的，并在胚胎早期发育。它们经常与其他脑血管疾病如动脉瘤相关联。
