• Daniel A Tonetti, Edward G Andrews, Kristen Stabingas, Elizabeth Tyler-Kabara, Bradley A Gross, and Ashutosh Jadhav.
• Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA. Electronic address: tonettida@upmc.edu.
• World Neurosurg. 2018 Jan 1; 109: 413-415.

BackgroundThe origin point of the anterior choroidal artery (AChA) is variable, typically arising from the supraclinoid internal carotid artery (ICA) distal to the posterior communicating artery (PComA) on either the posterolateral or posterior aspect of the ICA. Variations of AChA origin have important clinical implications, and rare origins reported previously include the ICA bifurcation and middle cerebral artery. We provide illustrations of a case of a shared-origin PComA and AChA.Case DescriptionA young girl presented with intracranial hemorrhage and underwent angiography to evaluate for an underlying cause. Ultimately, 3-dimensional rotational angiography incidentally demonstrated a common origin of the AChA with the PComA.ConclusionsA rare case of a shared-origin AChA and PComA is reported for angiographic illustration. The radiologic findings, embryology behind the development of the AChA, and neurosurgical and neurovascular relevance of this variant are discussed. The importance of recognizing the origin of the AChA is emphasized.Copyright © 2017 Elsevier Inc. All rights reserved.

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