Acoustic neuroma

Acoustic neuroma- Commonest nerve of origin is sup vestibular Vth nerve first involved Aka vestibular schwanoma/ neurilemmoma/ 8 nerve tumor Unilat snhl mc symptom Gd enhanced mri- ioc Glomus tumour- Tone decay significant Acoustic reflex shows stapedial reflex decay Retro cochlear snhl Treatment- surgery SISI 0-20% Recruitment absent Audible systolic bruu Aquino sign Mc benign tumor of mid ear Mc in females Age 40-60 yrs Rising sun sign Bleeds profusely Brown/ pulsation sign G jugulare n tympanicum Pulsatile tinnitus- earliest sign FISCH classification Treatment- micro surgical excision Brui Phelp sign on ct