Cerebral microhemorrhage

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 best seen on susceptibility weighted T2* sequences such as gradient-recalled echo (GRE) and susceptibility weighted imaging (SWI).

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

Stroke and intracranial haemorrhage

Article information

rID: 4560
Synonyms or Alternate Spellings:
  • Microbleeds (cerebral)
  • Cerebral microbleed
  • Cerebral microbleeds
  • Cerebral microhemorrhage
  • Cerebral microhaemorrhages
  • Cerebral microhemorrhages

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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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