case_images: PMC9072035_01
case_images: Three-dimensional reconstructed computed tomography angiography shows the carotid, subclavian, and vertebral arteries. A hypoplastic left vertebral artery originates from the aortic arch and is smaller than the right vertebral artery along its entire course. All mentioned vascular structures show normal caliber and course, smooth intima, and no narrowing or obliteration. AA = aortic arch; BCT = brachiocephalic trunk; LCCA = left common carotid artery; LSCA = left subclavian artery; RCCA = right common carotid artery; RSCA = right subclavian artery; LVA = left vertebral artery; RVA = right vertebral artery.
case_images: CRIS2022-1025019.001.jpg
case_images: PMC9072035_01_CRIS2022-1025019.001.jpg
case_images: fig1
case_images: The LVA originated from the aortic arch, between the Left Common Carotid Artery (LCCA) and the Left Subclavian Artery (LSCA) (Figure 1).
case_images: Computed tomographic angiography demonstrates the anterior-posterior (a), posterior-anterior (b), and lateral (c) views. AA = aortic arch; BCT = brachiocephalic trunk; LCCA = left common carotid artery; LSCA = left subclavian artery; RCCA = right common carotid artery; RSCA = right subclavian artery; LVA = left vertebral artery; RVA = right vertebral artery.
case_images: CRIS2022-1025019.002.jpg
case_images: PMC9072035_01_CRIS2022-1025019.002.jpg
case_images: fig2
case_images: In addition to the abnormal origin, a hypoplastic LVA was observed (Figure 2).