MRI of the Cerebellopontine Angle (CPA)

The cerebellopontine angle (CPA) is an anatomical region of the posterior cranial fossa located between the pons, cerebellum, and the petrous part of the temporal bone. Several important cranial nerves (V–VIII) pass through this area, including the trigeminal, facial, and vestibulocochlear nerves.

MRI of the cerebellopontine angle is a dedicated high-resolution examination using thin slices and 3D sequences to visualize cranial nerves, the internal auditory canal, and adjacent structures.

What CPA MRI Can Detect

  • vestibular schwannomas (acoustic neuromas);
  • meningiomas of the posterior fossa;
  • other mass lesions in the CPA region;
  • intracerebral and subarachnoid hemorrhage;
  • abscesses and inflammatory processes;
  • developmental abnormalities;
  • venous sinus thrombosis;
  • postoperative changes.

MRI of the Cerebellopontine Angle (CPA)

Indications for CPA MRI

  • suspected tumors of the cerebellopontine angle;
  • signs of cranial nerve V–VIII involvement;
  • preoperative assessment;
  • postoperative follow-up;
  • unexplained neurological deficits.

Symptoms Requiring Examination

  • hearing loss, especially unilateral;
  • persistent dizziness or vertigo;
  • facial muscle weakness or paralysis;
  • facial sensory disturbances;
  • taste disorders;
  • excessive tearing.
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CPA MRI is typically performed as an additional focused study alongside standard brain MRI to provide detailed evaluation of this complex anatomical region.