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. 2022 May 3;32(4):1045–1056. doi: 10.1007/s00062-022-01171-0

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — Intracranial manifestations of giant cell arteritis with left ACA-MCA watershed ischemia on DWI MRI (a). Time-of-flight MR angiography showed high-grade stenosis of supraclinoid LICA (white curved arrow, b). CT perfusion showed at-risk parenchyma throughout the left hemisphere, shown as T_max map (c) which prompted urgent endovascular treatment (treatment #1). Pretreatment lateral projection LICA injection shows 2 sites of critical stenosis (d, white arrows) which were treated with submaximal balloon angioplasty (e). Posttreatment result f showed substantial improvement in angiographic transit time and return of antegrade flow to the ophthalmic and posterior communicating arteries. Careful review of images showed a tiny, non-flow limiting dissection measuring < 1 cm (red arrow)