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  • Title: Dual origin of the left vertebral artery: extracranial MRA and CTA findings.
    Author: Tobin WO, Killeen R, Kinsella JA, McCabe DJ.
    Journal: J Neurol Sci; 2010 Nov 15; 298(1-2):150-2. PubMed ID: 20810134.
    Abstract:
    A 48-year-old man presented with a posterior circulation stroke secondary to left lateral medullary infarction. Contrast-enhanced magnetic resonance angiography (CEMRA) revealed 40-45% intracranial left vertebral artery stenosis, likely atherosclerotic in nature. CEMRA and subsequent computed tomography angiography also identified a duplicate origin of the left vertebral artery. The importance of recognition of this rare anatomical variant, its potential contribution to stroke aetiology, and the advantage of non-invasive vascular imaging prior to catheter angiography is emphasised.
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