Agenesis of the internal carotid artery with paraclinoid–supraclinoid anastomosis and basilar artery–posterior communicating artery anastomosis diagnosed by magnetic resonance angiography

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作者
Akira Uchino
Naoko Saito
Shinya Kohyama
机构
[1] Saitama Medical University International Medical Center,Department of Diagnostic Radiology
[2] Saitama Medical University International Medical Center,Department of Intravascular Neurosurgery
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关键词
Agenesis; Arterial circle; Cerebral arterial variation; Internal carotid artery; Magnetic resonance angiography;
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摘要
The several types of agenesis of the internal carotid artery (ICA) are classified based on the aplastic segment of the ICA and types of collateral circulation. On magnetic resonance angiography, we incidentally found an extremely rare case in which the patient had 2 types of collateral circulation—anastomosis between the paraclinoid and supraclinoid segments of the contralateral ICA and anastomosis between the tip of the basilar artery and the posterior communicating artery. This is the first report of a case of ICA agenesis with 2 such types of collateral circulation.
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页码:685 / 687
页数:2
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