Neurological Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA.
J Neurointerv Surg. 2013 May;5(3):e14. doi: 10.1136/neurintsurg-2011-010215. Epub 2012 Mar 22.
Extracranial carotid artery atherosclerotic stenosis typically occurs at the junction of the common carotid, external carotid and internal carotid arteries. Although rare, anatomical arterial variants can influence surgical strategy and can have a significant impact on surgical complications and patient outcome. An unusual case of atherosclerotic stenosis of the internal carotid artery (ICA) at the origin of a pharyngo-occipital variant off of the ICA is reported here.
A 60-year-old man presented with symptomatic severe left cervical ICA stenosis. The stenosis was related to the origin of the pharyngo-occipital common trunk which arose from the ICA rather than the typical origin off of the external carotid artery. The patient underwent successful left carotid endarterectomy with special attention to this variant anatomy.
Anomalies of the extracranial ICA, although rare, can influence the location of atherosclerotic disease and the surgical endarterectomy strategy. A detailed anatomical study should be performed prior to surgery to minimize risk and improve patient outcome.
颅外颈动脉粥样硬化性狭窄通常发生在颈总动脉、颈外动脉和颈内动脉的交界处。尽管罕见，但解剖学上的动脉变异会影响手术策略，并对手术并发症和患者预后产生重大影响。本文报告一例罕见的起源于颈内动脉咽后枕动脉变异处的颈内动脉粥样硬化性狭窄病例。
一名 60 岁男性因左侧颈内动脉严重狭窄出现症状。狭窄与咽后枕动脉共同干的起源有关，该共同干起源于颈内动脉，而不是典型的起源于颈外动脉。患者成功接受了左侧颈动脉内膜切除术，特别注意了这种变异解剖结构。
尽管颅外颈内动脉的异常很少见，但可能会影响粥样硬化病变的位置和颈动脉内膜切除术的策略。在手术前应进行详细的解剖学研究，以最大限度地降低风险并改善患者的预后。
