Aberrant Left Vertebral Artery Arising Distal to the Left Subclavian Artery: A Rare Anatomic Variant Demonstrated on Computed Tomographic Angiography

Key Points

• The research aims to highlight a rare anatomical variant of the left vertebral artery.
• Case report of a 56-year-old man with incidental findings from computed tomographic angiography.
• Examination of the vascular anatomy concerning the left vertebral artery and left subclavian artery.
• The computed tomographic angiography revealed a left vertebral artery arising distal to the left subclavian artery.
• This anatomical variant is associated with increased neurologic risk.
• Findings underscore the procedural relevance of recognizing this variant.