释义 |
DictionarySeeacoustic neuromavestibular schwannoma
vestibular schwannomaa 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. Synonym(s): acoustic neurinoma, acoustic neuroma, acoustic schwannoma, acoustic tumor, cerebellopontine angle tumor, eighth nerve tumoracoustic 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. |