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. 2023 Apr 20;14:1078173. doi: 10.3389/fneur.2023.1078173

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Copyright © 2023 Zhang, Su and Yu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Angioarchitecture of twig-like MCA. (A) Two-dimensional DSA of the right ICA showing a right twig-like MCA and an aneurysm (arrow) at the origin of the AccMCA from the A1 segment. (B) Three-dimensional DSA showing that the ICA (arrowhead) did not give off the branch supplying the twig-like MCA; the arrow indicates the aneurysm. (C) Three-dimensional DSA showing the AccMCA (arrowhead) as a collateral artery from the A1 segment supplying the twig-like MCA; the arrow indicates the aneurysm. (D) Three-dimensional DSA showing that the AchA (arrowhead) supplies the twig-like MCA. A1, first segment; AccMCA, accessory middle cerebral artery; ACA, anterior cerebral artery; AchA, anterior choroidal artery; DSA, digital subtraction angiography; ICA, internal carotid artery; MCA, middle cerebral artery.