vestibular schwannoma

(redirected from eighth nerve tumor)

vestibular schwannoma

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 neuroma

A usually benign tumour of the 8th cranial nerve, which arises from the Schwann cells that sheathe the acoustic nerve.
 
Epidemiology
1:100,000; 8% are bilateral; 16% are associated with type-2 von Recklinghausen’s disease.
 
Diagnosis
Auditory evoked potentials, MRI, CT.
 
Management
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.