A rare case with the absence of a distinct common brachiocephalic trunk in an adult mixed-breed horse

Document Type : Case report

Authors

• Younes Kamali
• Zabihollah Khaksar

Department of Basic Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran.

10.22067/ijvst.2020.39238

Abstract

The only branch that detaches from the aortic arch of adult horses is the common brachiocephalic trunk. This report describes a rare case of the unusual arterial arrangement of the aortic arch in a female adult horse. The aortic arch was found to lack a common brachiocephalic trunk and had instead two branches, the first being a brachiocephalic trunk and the second being a left subclavian artery. The direct origin of the left subclavian artery from the aortic arch is very rare in horses and a similar case has not been reported previously. The potential embryologic and phylogenetic aspects of this variation are discussed.

Keywords

• Common brachiocephalic trunk
• horse
• left subclavian artery

20.1001.1.2008465.2020.12.2.13.1

Main Subjects

• Equine

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