Background: The most common branching pattern observed is separate origination of three branches springing from the arch of aorta: the brachiocephalic trunk, left common carotid artery and left subclavian artery. Knowledge of anatomical variations in the origin of brachiocephalic trunk and left common carotid artery from the arch of aorta are important in avoiding surgical and accidental injuries during aortic instrumentation, thoracic and neck surgeries.
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