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. 2018 Jul 12;58(8):341–349. doi: 10.2176/nmc.oa.2018-0076

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© 2018 The Japan Neurosurgical Society

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/

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Fig. 1 — Case 1: Conventional angiography of the left VA performed at the time of admission showed aneurysmal dilation on the left VA involving the PICA origin (a: frontal view, b: lateral view, arrow: dilation). Conventional angiography of the right VA after proximal occlusion of the left VA and endovascular coiling showed persistent retrograde flow to the residual aneurysm and left PICA (c: frontal view, d: lateral view). Follow-up angiography of the right VA performed 6 months later revealed enlargement of the residual aneurysm (arrow). Filling was via the contralateral right VA (e: frontal view, f: lateral view). VA: vertebral artery, PICA: posterior inferior cerebellar artery.