Horners Syndrome Flashcards
1
Q
def
A
disorder characterised by 1 miosis 2 partial ptosis 3 anhidrosis 4 enopthalmos
2
Q
what is miosis
A
pupil constriction
3
Q
aetiology
A
interruption to sympathetic innervation of the face
4
Q
what are the causes of loss of sympathetic innervation to the face
A
demyelination (MS)
syringomyelia
pancoasts tumour
5
Q
epi
A
rare
6
Q
history
A
usually none
7
Q
examination
A
1 miosis
2 partial ptosis
3 anhidrosis
4 enopthalmos
8
Q
investigations
A
to confirm horners: 1 cocaine drop test -horners: failure to dilate pupil 2 paredrine test -to localise cause of miosis -3rd order neuron intact, amphetamine will cause pupil dilation -3rd order neuron lesion, amphetamine will fail to dilate pupil 3 dilation lag test
for cause:
- bloods
- MRI/CT head
- CXR/CT chest
9
Q
how would you distinguish between ptosis caused by horners and ptosis caused be oculomotor lesion
A
horners: ptosis + pupil constriction
oculomotor lesion: ptosis + pupil dilation
10
Q
management
A
treat the cause
