Disease Information for Acoustic neuroma (Clinical Manifestations)

Acoustic Neurilemmoma, Acoustic Neurilemmomas, Acoustic Neurilemoma, Acoustic Neurilemomas, acoustic neurinoma, Acoustic Neurinomas, Acoustic neuroma, Acoustic neuroma (disorder), Acoustic Neuromas, Acoustic Schwannoma, Acoustic Schwannomas, AN Acoustic neuroma, BRAIN TUMOR ACOUSTIC NEUROMA, INTRACRANIAL NEOPLASM ACOUSTIC NEUROMA, Neurilemmoma Acoustic, Neurilemmomas Acoustic, Neurilemoma Acoustic, Neurilemomas Acoustic, NEURINOMA ACOUSTIC, Neurinomas Acoustic, NEUROFIBROMA ACOUSTIC, Neuroma acoustic, NEUROMA ACOUSTIC, Neuromas Acoustic, Schwannoma Acoustic, Schwannoma Vestibular, Schwannomas Acoustic, Schwannomas Vestibular, Vestibular Neurilemmoma, Vestibular schwannoma, Vestibular Schwannomas

A schwannoma that arises from the vestibular division of the vestibulocochlear nerve and tends to present in the fifth or sixth decade of life; Clinical manifestations include loss of hearing, headache, vertigo, facial pain, tinnitus, and facial weakness; Bilateral acoustic neuromas are associated with NEUROFIBROMATOSIS 2-------- (From Adams et al, Principles of Neurology, 6th ed,)------------------------------- Lesions of the eighth cranial nerve and central audiovestibular pathways produce neural hearing loss and vertigo; One characteristic of neural hearing loss is deterioration of speech discrimination out of proportion to the decrease in pure tone thresholds; Another is auditory adaptation, wherein a steady tone appears to the listener to decay and eventually disappear; Auditory evoked responses are useful in distinguishing cochlear from neural losses and may give insight into the site of lesions within the central pathways; The evaluation of central audiovestibular disorders usually requires imaging of the internal auditory canal, cerebellopontine angle, and brain with enhanced MRI;-----------------------------------------------------------Vestibular Schwannoma (Acoustic Neuroma); Eighth nerve schwannomas are among the most common of intracranial tumors; These benign lesions arise within the internal auditory canal and gradually grow to involve the cerebellopontine angle, eventually compressing the pons and resulting in hydrocephalus; Their typical auditory symptoms are unilateral hearing loss with a deterioration of speech discrimination exceeding that predicted by the degree of pure tone loss; Nonclassic presentations, such as sudden unilateral hearing loss, are fairly common; Any individual with a unilateral or asymmetric sensorineural hearing loss should be evaluated for an intracranial mass lesion; Vestibular dysfunction more often takes the form of continuous dysequilibrium than episodic vertigo; Other lesions of the cerebellopontine angle such as meningioma and epidermoids may have similar audiovestibular manifestations; Diagnosis is made by enhanced MRI, though auditory evoked responses may have a role in screening; Microsurgical excision is most often indicated, though small tumors in older individuals may be managed with stereotactic radiotherapy or simply followed with serial imaging studies; [CURRENT dx rx 2005]-------------------------------------Acoustic Neuroma<br>

Acoustic Neurilemoma; Bilateral Acoustic Neuroma <br>

Cerebellopontine Angle Tumor; Fibroblastoma, Perineural; <br>

Neurinoma of the Acoustic Nerve; Neurofibroma of the Acoustic Nerve; Schwannoma of the Acoustic Nerve; Acoustic Neuroma is a benign (non-cancerous) growth that begins at the 8th cranial nerve, which runs from the brain to the inner ear; Any disruption of the signals sent along the 8th cranial nerve will interfere with hearing and with the patient’s balance--------[NORD 2005]--------------

(Edit)

• Suggest a Missing Finding
• Suggest a Correction or Removal
• Suggest a Better Translation
• Suggest a Reference or External Link
• Suggest an Image
• How Can We Make It Better?
• Become an Editor
• Your Testimony

Available only to registered users.