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Age: 50

Sex: Female

Indication: Headache


Mimicking a Mass

Findings Relating to the Mimic

  • Prominent, but normal right cerebellar flocculus.  No mass.


  • Part of the folucculonodular lobe
  • The flocculus projects into the cerebellopontine angle cistern between the cerebellar hemisphere and the middle cerebellar peduncle. The flocculus is posterior to the facial and vestibulocochlear nerves and internal auditory canal, and lateral to the choroid plexus protruding through the foramen of Luschka.


Inferior View of the Cerebellum. Anatomist90 / CC BY-SA (https://creativecommons.org/licenses/by-sa/3.0) via WikiMedia https://upload.wikimedia.org/wikipedia/commons/2/2c/Slide2SEER.JPG Prominent, but normal flocculus (red arrow) Prominent, but normal flocculus (red arrows) Normal flocullus (red arrow) on subsequent MRI (axial T2) Normal bilateral floculli (red arrows) on subsequent MRI (coronal T2 FLAIR)

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