case_images: PMC11766760_01
case_images: Maximum intensity projection images (a,b) of the CT scan show two arterial branches, the first one arising from the brachiocephalic trunk (red arrows) and the second one originating from the medial wall of the aortic arch (green arrows). Both vessels have a tortuous course, coiling around the esophagus and trachea, eventually merging to form the true right subclavian artery, which then follows its anatomical path. E = esophagus T = trachea.
case_images: life-15-00077-g001.jpg
case_images: PMC11766760_01_life-15-00077-g001.jpg
case_images: life-15-00077-f001
case_images: The examination revealed a normally oriented aortic arch from which, in order, the brachiocephalic trunk, the left common carotid artery, the left subclavian artery, and, finally, an arterial branch similar to the lusoria artery originated (Figure 1). This last branch emerged from the medial wall of the descending part of the aortic arch, had a tortuous course around and behind the esophagus, and joined the subclavian branch of the brachiocephalic trunk to form the true subclavian artery (Figure 2, Video S1).
case_images: Virtual rendering anterior (a) and oblique (b,c) views revealed a normally oriented aortic arch from which the three main supra-aortic vessels emerged, and then a fourth branch similar to the lusoria artery had its origin. The origin and tortuous course of the aberrant branch can be identified (green arrows), along with its fusion with the true subclavian artery (red arrow). There was no significant compression effect of the two right subclavian branches over the esophagus or trachea (T, blue overlay). Also, there were no notable atherosclerotic changes to the aortic arch or any of the supra-aortic trunks. Origin of the internal mammary artery in the true RSA and of the vertebral artery from the brachiocephalic branch of the RSA. LSA = left subclavian artery;; RSA = right subclavian artery; RIMA = right internal mammary artery; LIMA = left internal mammary artery; RVA = right vertebral artery; LVA = left vertebral artery; T = trachea.
case_images: life-15-00077-g002.jpg
case_images: PMC11766760_01_life-15-00077-g002.jpg
case_images: life-15-00077-f002
case_images: This last branch emerged from the medial wall of the descending part of the aortic arch, had a tortuous course around and behind the esophagus, and joined the subclavian branch of the brachiocephalic trunk to form the true subclavian artery (Figure 2, Video S1).