cerebellopontine angle mass

Cerebellopontine angle (CPA) masses are relatively common. Although a diverse range of pathologies may be seen in this region, the most common by far is a vestibular schwannoma.


Cerebellopontine angle masses can be divided into four groups, based on imaging characteristics:

  • enhancing mass
  • mass with high T1 signal on MRI
  • mass with CSF intensity/density
  • other masses

Alternatively, a quick mnemonic to remember the common entities affecting the cerebellopontine angle is AMEN or SAME.

Enhancing mass
High T1 signal mass
CSF density mass
Other masses

Many other masses can present at or around the cerebellopontine angle. They include:

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