Cerebellopontine angle cistern

Last revised by Tariq Walizai on 6 Jan 2025

The cerebellopontine angle (CPA) cistern, also known as the pontocerebellar cistern, is a triangular CSF-filled subarachnoid cistern that lies between the anterior surface of the cerebellum and the lateral surface of the pons.

Gross anatomy

Boundaries
Contents
Relations
  • CN V lies superior to this space.

  • CN IX, CN X, and CN XI lie inferior

  • the middle cerebellar peduncle is inferior

Related pathology

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