en Neurology Neurology case report case report <span style="font-size:14px;"><span style="font-family:times new roman;"><span style="color:#0000FF;"><strong><em>Background</em></strong><em>:</em> </span>Knowledge of variations in the origin of vertebral artery (VA) is indispensable to vascular surgeons. Aberrant origin of vertebral artery on either side is an uncommon finding. There are unilateral and bilateral variability in VA origin.<br> <span style="color:#0000FF;"><strong><em>Case presentation:</em></strong></span> We present a case of vertebral artery dissection who was found to have bilateral VAs aberrant origin. The right VA took origin from the right common carotid artery (CCA) which is a completely a rare finding, and the left VA originated from the arch of aorta.<br> <span style="color:#0000FF;"><strong><em>Conclusion</em></strong><em>:</em> </span><em>Unlike most similar reported cases, the VA diameter at origin was larger on the left than on the right side. The possible embryological mechanism is discussed.</em></span></span><br> &nbsp; Aberrant origin, Vertebral artery variation, Embryology 116 119 http://caspjim.com/browse.php?a_code=A-10-1273-1&slc_lang=en&sid=1 Maryam Bahadori Maryam.bahadori.1987@gmail.com 100319475328460019976 100319475328460019976 No Department of Neurology, Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran Seyedeh Fahimeh Shojaei shojaee.fahimeh@yahoo.com 100319475328460019977 100319475328460019977 No Firoozgar Clinical Research Development Center (FCRDC), Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran Rezan Ashayeri re.Ashayeri@gmail.com 100319475328460019978 100319475328460019978 No Department of Neurology, Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran Sara Esmaeili sara.es64@gmail.com 100319475328460019979 100319475328460019979 No Department of Neurology, Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran Masoud Mehrpour Dr.MasoudMehrpour@gmail.com 100319475328460019980 100319475328460019980 Yes Firoozgar Clinical Research Development Center (FCRDC), Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran