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Updated: Jul 17, 2026

An In Vivo Assessment of Blood-Brain Barrier Disruption in a Rat Model of Ischemic Stroke
Published on: March 11, 2018
[Segmental occlusion of the internal carotid artery with collateral reinjection downstream from the carotid sinus]
G Böge1, O Prodhomme, M Piciche
1Service de chirurgie thoracique et vasculaire, CHU Arnaud-de-Villeneuve, 371 avenue du Doyen-Gaston-Giraud, 34295 Montpellier, France. gudrun.boge@tele2.fr
Insights
A 79-year-old man had complete internal carotid artery sinus obstruction, a rare finding. Collateral circulation from the external carotid artery ensured patency, allowing for potential surgical intervention.
Area of Science:
- Vascular Surgery
- Neurology
- Anatomy
Background:
- Preoperative evaluation for coronary bypass surgery is crucial for identifying unrelated vascular conditions.
- Atheromatous obstruction of the carotid artery can lead to stroke, necessitating careful assessment.
Observation:
- A 79-year-old male asymptomatic patient presented with complete atheromatous obstruction of the internal carotid artery sinus.
- The internal carotid artery remained patent downstream due to collateral supply from the ipsilateral external carotid artery.
Findings:
- This anatomical variation is attributed to a persistent embryonic artery, a rare developmental anomaly.
- Complete obstruction of the internal carotid artery sinus was identified incidentally.
Implications:
- Recognizing this atypical anatomy is vital for surgical planning in carotid artery interventions.
- The presence of collateral flow may render surgical intervention feasible in cases of complete obstruction, unlike in typical scenarios.
Abstract:
The preoperative evaluation before coronary bypass led to the discovery of complete atheromatous obstruction of the internal carotid artery sinus in a 79-year-old man free of any neurological symptom. Downstream from the carotid sinus, the patency of the internal carotid artery was ensured by a collateral branch fed by the ipsilateral external carotid artery. This exceptional anatomic variation can be explained by a persistent embryonic artery. The recognition of this atypical feature is clinically relevant because surgery may be possible in some cases, while it is not technically feasible in patients with total obstruction.
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