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Age: 37

Sex: Female

Indication: Headache

Cerebellar Horizontal Fissure

Mimicking an Infarct

Findings Relating to the Mimic

  • Age-advanced cerebellar atrophy with associated prominence of the horizontal fissures bilaterally.  No CT evidence of acute infarct.


  • In patient’s with cerebellar atrophy the horizontal fissures can appear prominent and mimic an infarct, particularly on thick cuts.
  • Usually the horizontal fissures can be differentiated from infarct given their linear and symmetric appearance in the setting of cerebellar atrophy.  Use your thins and reformats to help you identify the horizontal fissure.


Horizontal fissure (aka Horizontal Sulcus). Henry Vandyke Carter / Public domain. https://upload.wikimedia.org/wikipedia/commons/9/97/Gray704.png Characteristic appearence of bilateral enlarged horizontal fissures (red arrows) in the setting of cerebellar volume loss. Characteristic appearence of enlarged horizontal fissures (red arrows) on coronal.

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  • Image of the cerebellum by Henry Vandyke Carter (Public domain) via Wikimedia

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