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OTTONE, N. E.; CASOLA, L.; CIRIGLIANO, V.; OLORIZ, L.; BLASI, E. B.; MEDAN, C. D. & ALGIERI, R. D. Two cases ofleft vertebral artery emerging from a trunk in common with the left subclavian artery from the aortic arch. Int. J. Morphol., 31(2):646-649, 2013.SUMMARY: Anomalies arising in the embryological development of the aortic arch and its branches are essencial in theemergence of variations in the origin and course of supra aortic vessels. Classically, 95% of cases, the aortic arch gives rise to thebrachiocephalic artery, left common carotid artery and left subclavian artery. While the left vertebral artery arises normally from the leftsubclavian artery. In this presentation we describe two cases of the left vertebral artery being born of the aortic arch. The i mportance ofanatomical knowledge of this arterial variety is fundamental for base neck and aortic arch surgery, in cervicothoracic trauma thatcompromises the vascular elements and in endovascular procedures in the region.KEY WORDS: Left vertebral artery; Aortic arch; Thorax.

Two Cases of Left Vertebral Artery Emerging from a Trunk in Common with the Left Subclavian Artery from the Aortic Arch