Cerebral microhemorrhage

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

Cerebral microhemorrhages are generally 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 millimeter punctate regions of signal drop out with blooming artifact. This blooming grossly overestimates the size of the lesions, and they are usually inapparent on other sequences.

  • artificial heart valve metallic emboli (very rare)
  • pneumocephalus (very rare without proceeding surgery) 2
  • flow voids of veins 8
  • intracranial calcification 8
Stroke and intracranial haemorrhage

Article information

rID: 4560
Synonyms or Alternate Spellings:
  • Cerebral microbleed
  • Cerebral microbleeds
  • 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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