Cerebral microhemorrhage

Last revised by Rohit Sharma on 11 Feb 2024

Cerebral microhemorrhages, or cerebral microbleeds, are small focal intracerebral hemorrhages, often only visible on susceptibility-sensitive MRI sequences.

Cerebral microhemorrhages are only seen on MRI and are only seen on susceptibility weighted T2* sequences such as gradient-recalled echo (GRE) and susceptibility weighted imaging (SWI) 24.

They appear as conspicuous 2-10 mm punctate regions of signal drop out with blooming artifact 24. This blooming grossly overestimates the size of the lesions, thus they are usually inapparent on other MRI sequences and CT 24.

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Cases and figures

  • Case 1: cerebral amyloid angiopathy
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  • Case 2: chronic hypertension
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  • Case 3: radiotherapy
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  • Case 4: cavernous malformations
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  • Case 5: cerebral fat embolism
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  • Case 6: diffuse axonal injury
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  • Case 7: progressive facial hemiatrophy
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  • Case 8: hypoxia and critical illness
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  • Case 9: CADASIL
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  • Case 10: PRES
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  • Case 11: ARIA-H
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  • Case 12: intravascular lymphoma
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  • Case 13: ICANS
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  • Case 14: cerebral vasculitis
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  • Case 15: RVCL-S
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