Case report identifies a rare arterial variant linked to increased neurologic risk and procedural implications.
A 56-year-old man with incidental infra-renal aortic dissection was found on CTA to have a rare left vertebral artery arising distal to the left subclavian artery and entering at C7, a variant associated with increased neurologic risk and procedural relevance.
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Yu et al. (2026) studied this question.
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