A rare Presentation of Aberrant Right Subclavian Artery: A Case Report

Abstract The aorta, a vital artery originating from the left ventricle, typically divides into three branches in most individuals: the brachiocephalic trunk, the left common carotid artery, and the left subclavian artery. However, some individuals may present with variations in the branching pattern of the aortic arch. This case report discusses the unusual presentation of an Aberrant Right Subclavian Artery (ARSA) in a 50-year-old woman from Iran who sought medical attention due to dyspnea. Upon admission to the emergency department, the patient's blood pressure measurements in both arms showed a significant difference. This led to further investigation, including a CT angiography, which revealed an unusual course of the right subclavian artery. Instead of following the typical anatomical route, the aberrant artery passed through the second and third ribs, entered the right breast tissue, and then spiraled into the right upper limb. This case not only adds to the body of medical knowledge but also emphasizes the significance of clinical awareness and thorough diagnostic evaluation when encountering unusual and unexpected patient presentations.