Department of Neurosurgery, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, Iowa 52242, USA.
J Clin Neurosci. 2010 Oct;17(10):1334-6. doi: 10.1016/j.jocn.2010.04.003. Epub 2010 Jul 15.
Understanding cerebrovascular anatomy and its variations is of utmost importance in treating vascular malformations. The two patients presented here demonstrate yet to be reported anomalous origins of the cortical branches of the posterior cerebral artery. In one patient, fetal calcarine arteries were identified arising from the internal carotid arteries bilaterally with no calcarine branches arising from the posterior circulation and the basilar artery giving rise to terminal parieto-occipital arteries. Additionally, with vertebral artery injections, we found the dominant arterial supply to the right parieto-occipital artery arose from the right internal carotid artery and right posterior communicating artery and the dominant arterial supply to the left parieto-occipital artery arose from the right vertebral artery. A second patient demonstrated anomalous origins of the calcarine and parietal occipital branches from the supraclinoid left internal carotid artery. Understanding this complex cerebrovascular anatomy is important in the endovascular treatment of cerebrovascular aneurysms and malformations.
了解脑血管解剖及其变异对于治疗血管畸形至关重要。这里介绍的两例患者表现出后交通动脉皮质支的异常起源，目前尚未有报道。在一例患者中，双侧胎儿纹状动脉发自颈内动脉，没有纹状支发自后循环，基底动脉发出终顶枕动脉。此外，椎动脉造影发现，右侧顶枕动脉的主要供血动脉来自右侧颈内动脉和右侧后交通动脉，左侧顶枕动脉的主要供血动脉来自右侧椎动脉。第二例患者表现为纹状支和顶枕支异常起源于左侧颈内动脉床突上段。了解这种复杂的脑血管解剖结构对于血管内治疗脑血管动脉瘤和畸形非常重要。
