Cerebellopontine angle cistern

Last revised by Rohit Sharma on 6 Mar 2022

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

  • 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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