Duplication of the internal carotid artery and segmental aplasia of the vertebral arteries |
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| Institution: | 1. Department of Maxillofacial and Plastic Surgery, Intercommunal Hospital Centre of Villeneuve-St-Georges, Villeneuve-Saint-Georges, France;2. Department of Stomatology and Maxillofacial Surgery, University Hospital Treichville, Abidjan, Ivory Coast;1. Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan;2. Department of Oral and Maxillofacial Radiology, Kyushu University Hospital, Fukuoka, Japan;3. Department of Oral and Maxillofacial Radiology, Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama University, Okayama, Japan;4. Laboratory of Oral Pathology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan;1. Department of Oral and Maxillofacial Surgery, University of São Paulo School of Dentistry, São Paulo-SP, Brazil;2. Private Practice in Oral and Maxillofacial Surgery, São Paulo-SP, Brazil;1. Department of Orthopaedics, Huntsman Cancer Institute, Salt Lake City, Utah, USA;2. University of Utah School of Dentistry, Salt Lake City, Utah, USA |
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| Abstract: | The internal carotid artery mainly supplies the brain. As the internal carotid artery contributes to the formation of the cerebral arterial circle, its variations are relevant in imaging, interventional radiology, and surgery. Knowledge of these variations is important for vascular anastomosis in free flap reconstruction and in arterial ligatures for haemostasis. During a cadaveric cervical dissection, a duplicated left internal carotid artery was incidentally observed in the carotid triangle of the neck. The internal carotid branches were dissected up to their distribution to the brain. The two branches of the left internal carotid artery penetrated into the base of the skull by the carotid canal and the foramen magnum, respectively. With the right internal carotid artery, they formed the cerebral arterial circle. The basilar artery was formed by the branch of the left internal carotid artery entering the skull by the foramen magnum. The right internal carotid artery and the two branches of the left internal carotid gave rise to all of the arteries of the cerebral arterial circle. The vertebral arteries did not contribute to its formation. This duplication of the internal carotid arteries is rare, as the literature does not describe any case of vertebral artery aplasia replaced by an internal carotid artery. |
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| Keywords: | Internal carotid artery Cerebral arterial circle Basilar artery Vertebral artery Anatomic variation Cadaver |
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