The cerebellopontine angle (CPA) is delimited by the petrous bone, the cerebellum and the brainstem. A mass lesion at the CPA can result in pressure on cranial nerves and blood vessels, resulting in the CPA Syndrome.
Cranial nerves V to XI may be affected.
Clinical findings resulting from pressure on the 8th cranial nerve:
(1) unilateral hearing loss
(2) tinnitus
(3) vertigo
Other cranial nerve palsies include:
(1) facial nerve palsy
(2) nystagnus
(3) diplopia
(4) vocal cord palsy
(5) dysphagia
Uncontrolled progression of a mass lesion results in respiratory compromise and death.
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