A previously well 65 year old has has acute dysequilibrium and gaze-holding difficulties resulting in recurrent falls.


Question Number 0673
Question:
A previously well 65 year old has has acute dysequilibrium and gaze-holding difficulties resulting in recurrent falls. He is noted to have a vertical positional nystagmus, pursuit defects, a right-sided Horner's syndrome and a head tilt to the right. On examination he is found to have rolling of both eyes towards the side of the ptosis. A likely diagnosis is
a) occlusion of the right posterior inferior cerebellar artery
b) occlusion of the left superior cerebellar artery
c) Meniere's disease
d) acute labyrinthitis
e) senile calcific aortic stenosis


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