PDF(Pubmed)
Abstract：
Anatomic variations of intracranial arteries are of paramount importance in neurosurgery and interventional radiology. Three extremely rare arterial variants were found by observing the intracranial vascular anatomy on the magnetic resonance angiography files of a 56-year-old female patient. Firstly, on the left side of the vertebrobasilar axis, a persistent primitive lateral basilovertebral anastomosis was found uniting the left anterior inferior and posterior inferior cerebellar arteries; further, the left anterior inferior cerebellar artery looped above the nerves of the internal auditory canal. Secondly, the right posterior inferior cerebellar artery was shown to be leaving the vertebral artery and had a distal fenestration of the telovelotonsillar segment. Such cases of distal fenestrated posterior inferior cerebellar artery are rare. Thirdly, a partly duplicated anterior communicating artery was also found in the anterior circulation. In conclusion, magnetic resonance angiography helps distinguish and detail discrete and delicate rare arterial variants.
摘要：
颅内动脉的解剖变异在神经外科和介入放射学中至关重要。通过观察一名56岁女性患者的磁共振血管造影文件中的颅内血管解剖结构，发现了三种极为罕见的动脉变异。首先,在椎基底轴的左侧，发现持续的原始外侧基底椎体吻合术合并左前下和后下小脑动脉；此外，左小脑前下动脉在内耳道神经上方循环。其次,显示右后小脑下动脉正在离开椎动脉，并在远视扁桃体节段远端开窗。这种远端开窗小脑后下动脉的病例很少见。第三，在前循环中还发现了部分重复的前交通动脉。总之,磁共振血管造影有助于区分和详细的离散和微妙的罕见动脉变异。
