Pierro Antonio, Cilla Savino, Cucci Eleonora, Sallustio Giuseppina
Radiology Department, Fondazione di Ricerca e Cura "Giovanni Paolo II", Università Cattolica del Sacro Cuore, Largo A. Gemelli, 1, Campobasso 86100, Italy.
Department of Radiology, Medical Physics Unit, Fondazione di Ricerca e Cura "Giovanni Paolo II", Università Cattolica del Sacro Cuore, Campobasso, Italy.
Radiol Case Rep. 2017 May 27;12(3):606-609. doi: 10.1016/j.radcr.2017.04.010. eCollection 2017 Sep.
Congenital absence of internal carotid artery (ICA) is a rare anomaly seen in around 0.01% of the population. High incidence of aneurysms is reported in these patients population. Many patients are asymptomatic as the development of a collateral circulation ensures cerebral perfusion. The embryology, the common collateral pathways, and the imaging findings associated with this anomaly are illustrated with 2 new cases. We reported the cases of 2 totally asymptomatic patients at the time of imaging in which ICA agenesis was proved on computed tomography angiography. On imaging, all the most important findings necessary for ICA agenesis diagnosis have been identified and described. Noninvasive imaging techniques are currently the mainstay of ICA agenesis diagnosis.
先天性颈内动脉（ICA）缺如是一种罕见的异常情况，在大约0.01%的人群中可见。据报道，这些患者群体中动脉瘤的发生率较高。许多患者无症状，因为侧支循环的发育确保了脑灌注。本文通过2例新病例阐述了这种异常情况的胚胎学、常见侧支途径及相关影像学表现。我们报告了2例在成像时完全无症状的患者病例，计算机断层血管造影证实了ICA发育不全。在影像学上，已识别并描述了诊断ICA发育不全所需的所有最重要的表现。非侵入性成像技术目前是诊断ICA发育不全的主要手段。
