Triantafyllou George, Papadopoulos-Manolarakis Panagiotis, Duparc Fabrice, Tsakotos George, Piagkou Maria
Department of Anatomy, School of Medicine, Faculty of Health Sciences, National and Kapodistrian University of Athens, 75 Mikras Asias Str., Goudi, 11527, Athens, Greece.
Department of Neurosurgery, General Hospital of Nikaia-Piraeus, Athens, Greece.
Anat Sci Int. 2025 Apr 12. doi: 10.1007/s12565-025-00836-3.
The vertebral artery (VA) demonstrates considerable variability, including infrequent morphologic variants like double origin. The current imaging report presents an atypical case of a dual origin of a left vertebral artery (LVA), which was identified incidentally during routine computed tomography angiography of a 51-year-old male patient. The typical LVA originated from the left subclavian artery (LSCA), and the other one was an aberrant LVA (ALVA) that arose from the aortic arch (AA) in between the left common carotid artery (LCCA) and the LSCA. The two vessels (LVA and ALVA) converged proximally to the transverse process of the C6 vertebra. The embryological explanation for this variant likely pertains to the persistence of primitive dorsal aortic segments and intersegmental arteries. Although rare, with a prevalence of 0.1%, the occurrence of LVA double origin may have significant clinical implications, including alterations in hemodynamics, an increased risk of VA dissection, and complications during surgical or endovascular procedures. The identification of such variants through preoperative imaging is essential to prevent iatrogenic complications.
椎动脉（VA）表现出相当大的变异性，包括罕见的形态变异，如双起源。当前的影像学报告展示了一例非典型的左椎动脉（LVA）双起源病例，该病例是在一名51岁男性患者的常规计算机断层扫描血管造影中偶然发现的。典型的LVA起源于左锁骨下动脉（LSCA），另一个是异常LVA（ALVA），它起源于主动脉弓（AA），位于左颈总动脉（LCCA）和LSCA之间。这两条血管（LVA和ALVA）在C6椎体横突近端汇合。这种变异的胚胎学解释可能与原始背主动脉段和节间动脉的持续存在有关。虽然罕见，患病率为0.1%，但LVA双起源的发生可能具有重大临床意义，包括血流动力学改变、VA夹层风险增加以及手术或血管内操作期间的并发症。通过术前影像学识别此类变异对于预防医源性并发症至关重要。
