Aim: The anatomical and morphological variation of origin and course of prevertebral segment of vertebral artery is necessary for cardiothoracic surgeries and endovascular interventions.
Materials and Methods: Present variation was found in formalin fixed adult cadaver in department of Anatomy, Government Medical College and Hospital, Chandigarh during routine dissection of thorax.
Results: Normally vertebral artery arose from subclavian artery. In present case left vertebral artery was arising from arch of aorta between left common carotid and left subclavian artery.
Conclusion: An understanding of variability of vertebral artery remains most important in angiography and surgical procedures in thorax, head and neck regions.
Arch of aorta (AOA), Brachiocephalic trunk (BCT), Common carotid artery (CCA) Left vertebral artery (LVA), Right vertebral artery (RVA), Vertebral artery (VA), Subclavian artery (SA).