Vestibular Schwannoma Flashcards
1
Q
vestibular schwannoma
A
benign subarachnoid tumours that arise from the superior vestibular nerve (CNVIII) Schwann cell layer
2
Q
describe the course of vestibular schwannoma
A
typically indolent and benign
sporadic
unilateral
3
Q
schwann cell layer function
A
forms the myelin sheath on nerves in the PNS
(oligodendrocytes produce myelin in the CNS)
4
Q
how does vestibular schwannoma cause problems
A
it behaves as a space occupying lesion
5
Q
gender distribution of vestibular schwannoma
A
equal
6
Q
the patient in vestibular schwannoma
A
progressive ipsilateral tinnitus ± unilateral sensorineural deafness (due to cochlear nerve compression) ± vertigo
7
Q
how can vestibular schwannoma effect the cranial nerves
A
SOL
- mainly: CNV compression can cause facial numbness and tingling
- CNVII compression causes facial paralysis
- CNVI also at risk of compression
8
Q
A
9
Q
investigation of vestibular schwannoma
A
CT or MRI
