Radiosurgery treatment of acoustic neuromas
. Our experience.
Although clinical picture was typical for acute acoustic trauma, audiometrical results were not specific for either acoustic/blast trauma or acoustic neuroma
. Acute acoustic trauma, coexisting AN and presbycusis apparently contributed to and mutually modified the course of hearing loss.
Retrosigmoid transmeatal approach: An anatomic study of an approach used for preservation of hearing in acoustic neuroma
surgery and vestibular neurotomy.
According to our study acoustic neuroma
is the most common tumor of the CP angle region which accounts for about 69.23% and is followed by meningioma and epodermoid 15.38% and 11.54% respectively.
These contain stereotactic radiosurgery (SRS) by using GammaKnife (GK) and CyberKnife (CK) or stereotactic radiotherapy (SRT) using CK or a linear accelerator (LINAC).1,6,7 Even though surgery presents both instancy and low rates of recurrence, the potential morbidity of surgical resection of acoustic neuromas
(ANs) can be meaningful.
Vestibular evoked myogenic potentials in patients with acoustic neuromas
. Arch Otolaryngol Head Neck Surg 1998;124:509-12.
TABLE 1 Types of dizziness and potential causes (3) Presyncope * Dysrhythmia * Vasovagal syncope * Orthostatic hypotension * Hypoglycemia * Hypoxia * Hyperventilation Vertigo * Benign paroxysmal positional vertigo * Labyrinthitis * Vestibular migraine * Meniere's disease * Genetic causes * Acoustic neuroma
* Age-related vestibular loss * Cerebellar infarction * Tullio phenomenon * Obstructive sleep apnea * Systemic sclerosis * Diabetes Disequilibrium Atypical ("light-headedness") * Panic attack * Early hyperventilation * Toxin exposure (eg, diphenylarsinic acid, pregabalin, paint thinner) TABLE 2 HINTS: Is the cause of the patient's vertigo central or peripheral?
is the most frequent benign tumour at cerebellopontine angle.1 It accounts for 8 10% of all primary intracranial tumours and 80% of Cerebellopontine angle tumours.2 Meningioma constitutes 5 10% of Cerebellopontine angle tumours with rare tumours constituting only a small percentage out of which epidermoid cyst is the most frequent.3 Acoustic neuroma
is a benign tumor arising from Schwann cells.4 It is usually diagnosed in adults with mean age ranging from 46 58 years with clinical incidence of 10 15%/ million / year.5 The tumor is generally composed of Antoni A and B types of tissues histologically.2 Type A tissue is highly cellular with little extra cellular matrix while type B tissues are less cellular with more loosely arranged cells.
(Figure 1) may occur in 90% of cases of patients with NF-2.
The researchers found that people who were using cell for 11-15 years were no more likely to develop an acoustic neuroma
. According to experts, acoustic neuroma
cause disorders such as ringing in the ears, dizziness and balance problems.
A working group of 31 scientists from 14 countries worked on the study, and the risk of cancer from mobile phones was evaluated as being limited but possible for glioma and acoustic neuroma
(4) The agency based its decision on limited evidence suggesting an increased risk for glioma (a malignant type of brain cancer) and acoustic neuroma
(a benign tumor of the nerve connecting the ear to the brain) associated with cell phone use.