PMC6180862_01
(a) Axial CT image at the level of main pulmonary artery shows an APW (open arrow). Axial image above the level of AA (b) shows six arteries, five directly arising from the aorta (1, innominate artery; 2, LECA; 3, left ICA; 4, left VA; and 5, LSA). Coronal maximum intensity projection image (c) demonstrates an APW (open arrow) and five arteries arising from the AA. Three-dimensional surface rendered view (d) showing the branches of AA (1-5). AA, aortic arch; APW, aortopulmonary window; ICA, internal carotid artery; LECA, left external carotid artery; LSA, left subclavian artery; VA, vertebral artery.
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fig1
APW (Figure 1a,c). Additionally, the aortic arch (AA) showed a unique branching pattern characterized by separate origins of the brachiocephalic artery (BCA), left external carotid artery (LECA), left internal carotid artery (ICA), left vertebral artery (VA) and left subclavian artery (LSA); overall, a five-vessel configuration of the AA (Figure 1b-d) was seen.