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. 2021 May 24;64(5):726–731. doi: 10.3340/jkns.2020.0332

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Copyright © 2021 The Korean Neurosurgical Society

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 1. — A 74-year-old woman was admitted for the treatment of an unruptured aneurysm. A : On time-of-flight magnetic resonance angiography three-dimensional (3D) reconstruction images, a saccular dilatation, possibly an aneurysm (arrow), was suspected near the posterior communicating artery (PcomA). B : Source image based new 3D rotational angiography showed that the PcomA originated from the wedge-shaped infundibulum (arrow). C : This lesion was confirmed as an infundibulum (arrow) on 3D rotational angiogram.