MRCP PACES Multiple Cranial Neuropathies Cerebellopontine Angle
  • Boundaries of the cerebellopontine angle:
    • Lateral aspect of pons
    • Inferior surface of cerebellar hemisphere
    • Superior surface of inner third of the petrous ridge
  • Signs:
    • Ipsilateral sensorineural hearing loss with tinnitus
    • Ipsilateral lower motor neuron facial nerve palsy with no hyperacusis
    • Ipsilateral facial sensory loss (involvement of trigeminal nerve)
    • Rarely, in advanced cases: palsy of CN VI, IX and X
  • Causes:
    • Acoustic neuromas (most common)
    • Meningiomas
    • Cerebellar astrocytoma
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