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Is Acoustic Neuroma A Brain Tumor?
Acoustic neuroma ( AN ) also known as vestibular schwannoma is a benignant neoplasm rebel from the cochlear part of the vestibulocochlear nervus which is the eighth cranial brass . Acoustic neuroma is quite rare and roughly move 1 in 100,000 persons in the population . Roughly about 2500 young cases of Acoustic neuroma are diagnosed each yr and the incidence has increase in a late dyad of years . It is more common in women than in men and commonly seen in the age group of 30 - 60 years .
The vestibulocochlear mettle runs from the inner ear to the Lily Pons and it is creditworthy for hearing and balance of the eubstance . Acoustic neuroma arises from the Schwan cellular telephone which incubate the face and it ’s a slowly - arise tumor . Since it arise from the eighth cranial face it is a benignbrain tumor . It usually occurs in the interior auditory meatus and slowly grows and expands to the brain stem . The exact cause of Acoustic neuroma is not have it away , the only risk component detect so far connect with Acoustic neuroma is neurofibromatosis type 2 which is an autosomal predominant disease and accounts for about 5 % of Acoustic neuroma cases.(3 )
Can Acoustic Neuroma Cause Death?
Even though Acoustic neuroma is a slow - growing tumor with time it can inflate and become a expectant tumor . Most patients are asymptomatic during the initial stages so until the tumor becomes large and pack together the next structures symptom might not appear . Acoustic neuroma can make some permanent damage and serious complications such as :
Out of this hydrocephalus is serious and it occurs due to blockage of the cerebrospinal fluid stream by a large tumor . Hydrocephalus can increase the intracranial pressure which can damage the brain , lead to stroke , coma ; brain stem herniation and death . The incidence of hydrocephalus due to Acoustic neuroma is quite rare . There is a case report of a 32 - year - one-time woman presenting the emergency department withheadache , sickness , andvomiting . She had a lesion in the cerebellopontine slant which was suspected as Acoustic neuroma . The initialCT scanrevealed a quaternary heart ventricle compression and hydrocephalus , a ventricular drain was inserted but the intracranial pressure rest gamy . The CT andMRI scandid after the operation divulge brainstem herniation and brain infarction and encephalon death was reassert . Therefore , identification of hydrocephalus and early treatment is needed .
Most of the death rate occurs during surgical operation or due to a complication of operating theatre . A nationwide study was done in the US to assess the morbidity and mortality rates trace the operative excision of Acoustic neuroma tumors from 1994 through 2003 . accord to the result , 10,297 patient role seek admission for Acoustic neuroma and out of those patient 4886 ( 47.5 % ) underwent retrosigmoid operative excommunication and 75 % of these lesions were declamatory . The deathrate rate following operative excision was 0.5 % ( 22 affected role snuff it ) and the charge per unit of contrary upshot was 6.1 % and the most rough-cut adverse outcome was facial nerve disorderliness which occurred in 25 % of the patient role . The in - hospital morbidity rate was 26.7 % . Translabyrinthine surgical extirpation carry an intraoperative death rate rate 0 - 2 % and the halfway cranial fossa excommunication has a 0 % deathrate rate.(1 ) ( 4 )
Conclusion
Acoustic neuroma is a benignant type of a brain tumour turn out from the cochlear parts of the vestibulocochlear nerve which is the 8th cranial nerve . acoustical neuroma is quite rare and approximately affects 1 in 100,000 persons in the population . Acoustic neuroma arises from the Schwan cells which treat the cheek and it ’s a slow - growing tumour and It ordinarily come about in the internal auditory meatus and slowly grows and expands to the nous stem . A patient can give out if the Acoustic neuroma neoplasm becomes tumid and obstruct the cerebrospinal mobile menstruation causing hydrocephalus which precede to increased intracranial pressure , if not treated by rights leads to herniation of the brainstem and death . However , hydrocephalus is a rare complication . More commonly patient role buy the farm follow operative excision of Acoustic neuroma , the mortality rate is about 0.5 % and the inauspicious effect rate following surgery is 6.1 % . Translabyrinthine surgical cut bear an intraoperative mortality pace 0 - 2 % and the middle cranial fossa excision has a 0 % mortality rate .
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