University:
Coventry University
Course:
B940 | Biomedical Science
Academic year:

2023
Views:

317

Pages:

6
Author:

Badusha S.

ACOUSTIC NEUROMA Malt common Benign tumor of CPangle (cculullo-Pontime anga) is accoustic Neuroma But is arises from the Indermal Acoustic Means i efe mort commonly from Infusion uestibular verve It is Benign out locally locally invasion , and also not on encapsulated But it is a very low. graining tumar. Bill's bar. Anterior Permion clinical Features Initial features are due to filling of intimal Accoustic meatмь First vecully Neue to ille compressed in the cochlear vere, leading to SNHC second superion vestibular Nerve, nt nerue lent the complaints about vertigo, becaun slow growing Tumor, pure will me da central comprensation, shun No vertigo Third. " ". facial verve, eacling to lass of sensory stimili supplied by this were, sous is luccave when a mixed vele gus compressed, sensory part is affect -ed first tham motor picul thus the sensory stimull scalerent. лая small part → Indomly Facial nerve supplies the pasterio. superior prart of EAC, this misthuria in this part olve to Acoustic Neuroma is celled as MITZEL BERGER SIGN (clinical significance of this sign is none - ble part of the pinna) as the Neve upplies Neglige # Thus Patient laints of only complaints 1. SNMC + Tinnitus. reen # man commondament in Elderly. In young B/ Accoustic Nerama is also allcociated with Neurofibromatceris rype 2 (NF-2) → * In NF-1 5% of the calls then is unilateral Acoustic Neuroma. va in this condition are catel elcluly Patient will have u/c SNHL + Tinnitus whereas in a preseicusis, there is B/L/ SNHC cater rrages, when the rumes spreads into the CP angle, the dy symptoms will be a) compresion of sthf otheN. by the upper freele the rumcor, thus symptoms Inellich Because of 5th were involvement the symptoms will le stas Parastheria cof the face. ) alerence of corneal reflex of oth → There will be siplapia. compression of 9th, 10th & 11th CN laumer prole of the Teman. dey the In Accoustic Neenam a 157 Nerve to be affected a and اد - 8th New 5th New - First occulan symptom tom to el reen is alerence of comeal reflex alirena of comeal Reflex is due to damage. 10 57 Nere. (Nat both sind 7th) affected component a nat Inurrigations comeal Reflex- alerent This suggest that the rumor has reached CP angle and inat least 2.5 cm in size. → Rimnes positive. 2) welurs cepposite siche 3) ABC → shortmexl 4) Schwabach → shortened. 5) PTA- AB - alerent gap- 6) Recruitment → alireni (gecature of cochlean cleafnes SISI0-20% 8) impedence ercepsclical Reflex decay a) BERA CatencyI is increared. Inter aural latency is greater than 0.2m sec of ware 10) MRI with Gadolinium enhancement will show su. cream cone appearance. 11) VEMP sud ured to diffrenticite between JUN & SUN SVN → o vemp IVN → Mgm MRI also tells us whether the Tumor is cystic or Not (accorclingly mgmt will chang Rx lis ahan fram More than 1.5 cm 15-3cm 3 cm wait gamma knife. surguy All cylic Accoustic Neuromas should be surgically Excised as they have the rendency to do grow Rapidly) por apurative Mistopathology antoni Type A: is arranged compactly antonic Types and has : is locerely arranged ryuic spaus, also has proon frognesis- REHABILITATION Incare of unilateral Acoustic Neuroma we go fo BAHA (detalls, why is exflaimed in lates classe) In case of go for. Bilciteral Acoustic vemoma we "Brainstem Implant It is placed o in carnal Recess of 4th ventricle which stimulates the cochlear Nuclei