Citation, DOI, disclosures and article data
Citation:
St-Amant M, Alhusseiny K, Hacking C, FLAIR vascular hyperintensities. Reference article, Radiopaedia.org (Accessed on 04 Jul 2024) https://doi.org/10.53347/rID-58052
FLAIR vascular hyperintensities are hyperintensities encountered on FLAIR sequences within subarachnoid arteries related to impaired vascular haemodynamics 1,2. They are usually seen in the setting of acute ischaemic stroke and represent slow retrograde flow through collaterals (and not thrombus) distal to the site of occlusion 3.
Although more studies are needed to confirm their significance and this is somewhat controversial at the time of writing this article, they are mostly thought to represent good collaterals and be associated with a better prognosis in the setting acute ischaemic stroke 4-7.
Radiographic features
MRI
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FLAIR: serpiginous/linear hyperintense signal within an artery in the subarachnoid space
See also
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1. Azizyan A, Sanossian N, Mogensen MA, Liebeskind DS. Fluid-attenuated inversion recovery vascular hyperintensities: an important imaging marker for cerebrovascular disease. (2011) AJNR. American journal of neuroradiology. 32 (10): 1771-5. doi:10.3174/ajnr.A2265 - Pubmed
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2. Legrand L, Tisserand M, Turc G, Naggara O, Edjlali M, Mellerio C, Mas JL, Méder JF, Baron JC, Oppenheim C. Do FLAIR vascular hyperintensities beyond the DWI lesion represent the ischemic penumbra?. (2015) AJNR. American journal of neuroradiology. 36 (2): 269-74. doi:10.3174/ajnr.A4088 - Pubmed
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3. Sanossian N, Saver JL, Alger JR, Kim D, Duckwiler GR, Jahan R, Vinuela F, Ovbiagele B, Liebeskind DS. Angiography reveals that fluid-attenuated inversion recovery vascular hyperintensities are due to slow flow, not thrombus. (2009) AJNR. American journal of neuroradiology. 30 (3): 564-8. doi:10.3174/ajnr.A1388 - Pubmed
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4. E. Mahdjoub, G. Turc, L. Legrand, J. Benzakoun, M. Edjlali, P. Seners, S. Charron, W. Ben Hassen, O. Naggara, J.-F. Meder, J.-L. Mas, J.-C. Baron, C. Oppenheim. Do Fluid-Attenuated Inversion Recovery Vascular Hyperintensities Represent Good Collaterals before Reperfusion Therapy?. (2018) American Journal of Neuroradiology. 39 (1): 77. doi:10.3174/ajnr.A5431 - Pubmed
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5. Huang X, Liu W, Zhu W, Ni G, Sun W, Ma M, Zhou Z, Wang Q, Xu G, Liu X. Distal hyperintense vessels on FLAIR: a prognostic indicator of acute ischemic stroke. (2012) European neurology. 68 (4): 214-20. doi:10.1159/000340021 - Pubmed
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6. Olindo S, Chausson N, Joux J, Saint - Vil M, Signate A, Edimonana-Kapute M, Jeannine S, Mejdoubi M, Aveillan M, Cabre P, Smadja D. Fluid-attenuated inversion recovery vascular hyperintensity: an early predictor of clinical outcome in proximal middle cerebral artery occlusion. (2012) Archives of neurology. 69 (11): 1462-8. doi:10.1001/archneurol.2012.1310 - Pubmed
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7. Liu D, Scalzo F, Rao NM, Hinman JD, Kim D, Ali LK, Saver JL, Sun W, Dai Q, Liu X, Liebeskind DS. Fluid-Attenuated Inversion Recovery Vascular Hyperintensity Topography, Novel Imaging Marker for Revascularization in Middle Cerebral Artery Occlusion. (2016) Stroke. 47 (11): 2763-2769. doi:10.1161/STROKEAHA.116.013953 - Pubmed
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