Abstract：
OBJECTIVE: The present case report aims to describe the rare coexistence of three variants of the cerebral arterial system diagnosed by computed tomography angiography (CTA).
METHODS: A retrospective study on head and neck CTAs was performed on a Greek adult population from the Department of Radiology, University Hospital of Larissa. An interesting case of an 80-year-old male was further investigated.
RESULTS: The cerebral arterial circle presented with a combination of three variations. The left anterior cerebral artery (ACA) was fenestrated 1.4 mm proximally to the anterior communicating artery formation. The left posterior cerebral artery (PCA) was also fenestrated, 5.5 mm distally to its origin from the basilar artery. Lastly, the right PCA originated from the ICA supraclinoid segment.
CONCLUSIONS: This case report highlights an unusual coexistence of A1 and P1 segments fenestration with a fetal PCA, resulting in a unique cerebral circle. A1 segment fenestration has been previously reported as rare, while the PCA fenestration as extremely rare variant. Awareness of these rare variations could aid interventionists in their preoperative assessments.
METHODS: A retrospective study on head and neck CTAs was performed on a Greek adult population from the Department of Radiology, University Hospital of Larissa. An interesting case of an 80-year-old male was further investigated.
RESULTS: The cerebral arterial circle presented with a combination of three variations. The left anterior cerebral artery (ACA) was fenestrated 1.4 mm proximally to the anterior communicating artery formation. The left posterior cerebral artery (PCA) was also fenestrated, 5.5 mm distally to its origin from the basilar artery. Lastly, the right PCA originated from the ICA supraclinoid segment.
CONCLUSIONS: This case report highlights an unusual coexistence of A1 and P1 segments fenestration with a fetal PCA, resulting in a unique cerebral circle. A1 segment fenestration has been previously reported as rare, while the PCA fenestration as extremely rare variant. Awareness of these rare variations could aid interventionists in their preoperative assessments.
摘要：
目的：本病例报告旨在描述通过计算机断层扫描血管造影（CTA）诊断的三种大脑动脉系统变体的罕见共存。
方法：对来自放射科的希腊成年人进行了头颈部CTA的回顾性研究，拉里萨大学医院。进一步调查了一个有趣的80岁男性病例。
结果：脑动脉环有三个变异的组合。左脑前动脉（ACA）在前交通动脉形成的近端1.4mm处开窗。左脑后动脉（PCA）也有开窗，从基底动脉开始远端5.5毫米。最后,右PCA起源于ICA上样段。
结论：本病例报告强调了A1和P1节段开窗术与胎儿PCA的异常共存，形成了一个独特的大脑圈.A1段开窗术以前曾被报道为罕见的，而PCA开窗术作为极其罕见的变体。意识到这些罕见的变化可以帮助干预学家进行术前评估。
方法：对来自放射科的希腊成年人进行了头颈部CTA的回顾性研究，拉里萨大学医院。进一步调查了一个有趣的80岁男性病例。
结果：脑动脉环有三个变异的组合。左脑前动脉（ACA）在前交通动脉形成的近端1.4mm处开窗。左脑后动脉（PCA）也有开窗，从基底动脉开始远端5.5毫米。最后,右PCA起源于ICA上样段。
结论：本病例报告强调了A1和P1节段开窗术与胎儿PCA的异常共存，形成了一个独特的大脑圈.A1段开窗术以前曾被报道为罕见的，而PCA开窗术作为极其罕见的变体。意识到这些罕见的变化可以帮助干预学家进行术前评估。
