Variations of aortic arch branching

Variations in the origin of the aortic arch branches. (A) and (B) represent the majority of anomalies found in the general population.
(A) Common origin of the left common carotid artery and brachiocephalic artery (bovine arch). Represents 73 percent of all branch variations.
(B) Origin of the left common carotid from the mid- to upper brachiocephalic artery. Represents 22 percent of all branch variations.
(C) Common carotid trunk giving origin to the left subclavian artery.
(D) Common carotid trunk, independent from both subclavian arteries.
(E) Left and right brachiocephalic arteries.
(F) Single arch vessel (brachiocephalic artery) originates the left common carotid and left subclavian arteries.
(G) Aberrant takeoff of the right subclavian artery from the left and passing behind the aortic arch vessels. With this anomaly, dilation of the proximal subclavian can occur and is termed a Kommerell diverticulum.^[1,2]