Abstract:

Normally, the human Aortic arch branching into three vessels, the adult archetype of the Aortic arch and its branches are formed, due to the different growth pattern of the branchial arch arteries and their associated “migration” and “merging” of their branches. The anomalous branching patterns in the aortic arch are due to the deviations or disturbances the normal growth pattern of the aortic or branchial arch arteries during the embryonic period. The brachiocephalic trunk (BCT), the left common carotid artery (LCCA), the left vertebral artery (LVA), and the left subclavian artery (LSA) pattern was the most common four vessels arch branching pattern accounting up to 84.8%. The common trunk formation by these vessels is prevalence up to 16.1%, out of which 11% of the cases were the left vertebral artery originated with the left subclavian artery and form the “common vertebro-subclavian trunk - CVST”. The ontogenesis for these anomalous anatomical configurations and its clinical significance are still remaining unclarified. The implication of these common trunk arteries has not been properly signified in the literature till now. Till today the common vertebro-subclavian trunk Aortic arches are commonly regarded as a normal variant so, very little direct data are available. Generally, the patients with common vertebro-subclavian trunk Aortic arches are clinically normal and asymptomatic. Currently, the clinicians claimed the common vertebro-subclavian trunk Aortic arches are common in patients with atheromatic hypoperfusion and aneurysms. The present study aimed to through insight knowledge about this common trunk variant of the aortic arch. Recently, it is well identified that the suspicion exists with silent common vertebro-subclavian trunk Aortic arches, leads to sudden severe neurological complications due to the wide range of atheromatous plaques and congenital aneurysms, may cause fatal. Since the common vertebro-subclavian trunk Aortic arches are treated as “Mutilated Common Trunk –MCT” of the aortic arches.

Keywords: Mutilated Common Trunk, Common vertebro-subclavian trunk, Bovine trunk, Truncus bicaroticus.

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