De novo formation of a carotid web: case report

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A carotid web is a shelf-like intraluminal filling defect typically arising from the posterolateral wall of the proximal internal carotid artery. It is recognized as a possible cause of ischemic stroke in young adults. However, its etiopathogenesis is controversial and remains to be fully elucidated. The authors report de novo formation of a carotid web from an intimal dissection documented on serial imaging studies. The findings in this case suggest that a focal intimal dissection could be the underlying cause of a carotid web. Lower shear stress at the posterolateral wall of the proximal internal carotid artery is hypothesized to be a predisposing factor and explains the predilection of a carotid web for this specific location.

ABBREVIATIONS CTA = CT angiography; ICA = internal carotid artery; US = ultrasound.
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Contributor Notes

Correspondence Giuseppe Lanzino: Mayo Clinic, Rochester, MN. lanzino.giuseppe@mayo.edu.INCLUDE WHEN CITING Published online November 30, 2018; DOI: 10.3171/2018.7.JNS181579.Disclosures The authors report no conflict of interest concerning the materials or methods used in this study or the findings specified in this paper.
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