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Updated: Feb 6, 2026

Modeling Stroke in Mice: Transient Middle Cerebral Artery Occlusion via the External Carotid Artery
Published on: May 24, 2021
An Anatomical Variation in the Cervical Carotid Artery of a Young Stroke Patient
Tatsunori Natori1, Shinsuke Narumi1, Takafumi Suzuki1
1Department of Neurology and Gerontology, Institute for Biomedical Sciences, Iwate Medical University, Japan.
Abstract:
The cervical carotid artery has been reported to show anatomical variations. We report the case of a young stroke patient with a small right-parietal-lobe infarction whose cervical carotid artery showed anatomical variation. The right internal carotid artery (ICA) originated at the C2 level of the external carotid artery with protrusion at the right carotid bifurcation. The vessel wall of the protrusion showed a high signal intensity on T1-weighted magnetic resonance carotid plaque imaging. The protrusion, considered a remnant of the ICA, possibly caused the stroke due to the formation of thrombi as a result of changes in blood flow and viscosity.
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