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a benign but life-threatening tumor arising from Schwann cells, usually of the vestibular division of the eighth cranial nerve in early stage; produces hearing loss, tinnitus, and vestibular disturbances and in late stages cerebellar, brainstem, and other cranial nerve signs and increased intracranial pressure.
acoustic neuromaA usually benign tumour of the 8th cranial nerve, which arises from the Schwann cells that sheathe the acoustic nerve.
1:100,000; 8% are bilateral; 16% are associated with type-2 von Recklinghausen’s disease.
Auditory evoked potentials, MRI, CT.
Surgical removal by dissection, cautery, laser obliteration.
ves·tib·u·lar schwan·no·ma(ves-tib'yū-lăr shwah-nō'mă)
A benign but life-threatening tumor arising from Schwann cells, usually of the vestibular division of the vestibulocochlear nerve; produces hearing loss; tinnitus; vestibular disturbances; early and cerebellar, brainstem, and other cranial nerve signs; and increased intracranial pressure in late stages.