Subarachnoid FLAIR hyperintensity

Last revised by Dr Avni K P Skandhan on 27 Jul 2021

There are a wide range of causes for subarachnoid FLAIR hyperintensity, both pathological and artifactual. 

Differential diagnosis

Pathological causes
Artifactual causes

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Cases and figures

  • Case 1
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  • Case 2: moyamoya
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  • Case 3: ruptured dermoid cyst
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  • Case 4: acute right MCA occlusion
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  • Case 5: leptomeningeal spread from breast cancer
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  • Case 6: subarachnoid FLAIR vascular hyperintensities
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