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. 2021 Jun 3;61(9):515–520. doi: 10.2176/nmc.oa.2021-0058

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© 2021 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 — Ischemic stroke case. A 19-year-old male without any vascular risk factors presented a right transient ischemic attack. Transverse time-of-flight MRA indicates bilateral middle cerebral artery (MCA) stenosis. The MRA and contrast high-resolution vessel wall MRI obtained at the initial evaluation (A), and 6 (B), 12 (C), and 24 (D) months later are provided. The intensity of vessel wall enhancement (VWE) at right MCA was changed (grade 1→grade 0→grade 1→grade 1; white arrow), but the degree of VWE at left MCA was not changed (grade 1→grade 1→grade 1→grade 1; white arrowhead). The stenosis progression was observed only at left MCA (E and F; white arrow).