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Absent right common carotid artery associated with aberrant right subclavian artery
Akira Uchino1, Kazuhiko Uwabe2, Iichiro Osawa3
11 Department of Diagnostic Radiology, Saitama Medical University International Medical Center, Japan.
Abstract:
Rarely, the external and internal carotid arteries arise separately from the brachiocephalic trunk and right subclavian artery (SA) or the aortic arch and reflect the absence of a common carotid artery (CCA). We report a 45-year-old man with absent right CCA associated with aberrant right SA, an extremely rare combination, diagnosed by computed tomography (CT) angiography during follow-up for postoperative aortic dissection. Retrospective careful observation of preoperative postcontrast CT revealed the absent right CCA. Previously reported arch variations associated with absent CCA include cervical aortic arch, double aortic arch, and right aortic arch.
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