@article {Lowenthal:2022:2637-8329:188, title = "Agenesis of the ICA with a Contralateral Cavernous-Supraclinoid Anastomotic Vessel", journal = "Neurographics", parent_itemid = "infobike://asnr/ng", publishercode ="asnr", year = "2022", volume = "12", number = "4", publication date ="2022-10-01T00:00:00", pages = "188-191", itemtype = "ARTICLE", issn = "2637-8329", eissn = "2637-8329", url = "https://asnr.publisher.ingentaconnect.com/content/asnr/ng/2022/00000012/00000004/art00002", doi = "doi:10.3174/ng.2100029", keyword = "ACA = anterior cerebral artery, AcomA = anterior communicating artery", author = "Lowenthal, J.M. and Kane, I.W. and Gupta, G. and Keller, I. and Roychowdhury, S.", abstract = "Congenital agenesis of an ICA is exceptionally rare. Survival requires remodeling of the intracranial vasculature, with several classic vascular patterns and anastomoses having been recognized in the literature. We present a patient with ICA agenesis who exhibited a distinctive anastomotic vessel extending from the contralateral cavernous carotid artery directly to the supraclinoid ICA on the affected side, a finding only documented in a handful of patients with this already rare condition.", }