Acoustic Neuroma Flashcards
What is an acoustic neuroma?
A benign schwann cell tumour surrounding the vestibulocochlear nerve
Where in the brain do acoustic neuromas occur?
Cerebellopontine angle
Where are schwann cells found?
In the peripheral nervous system
What is the typical presentation of an acoustic neuroma?
40-60 years old
Gradual onset of:
- Unilateral hearing loss
- Unilateral tinnitus
- Vertigo
- Sensation of fullness in the ear
What is the presentation of a progressed acoustic neuroma?
Cranial nerve 5, 6, 7, 8, 9 and 10 palsies
What condition is associated with a bilateral acoustic neuroma?
Neurofibromatosis type 2
What investigations are carried out to diagnose acoustic neuroma?
Audiometry
CT
MRI - provides more detail than CT
What is the management of acoustic neuroma?
Conservative management - monitoring if no symptoms
Partial or total surgical removal
Radiotherapy
What cranial nerve palsies does acoustic neuroma typically present with?
5, 7 and 8
What is the definitive investigation for acoustic neuroma?
MRI of the cerebellopontine angle
