A 42 year old man has a one year history of proptosis of his left eye and diplopia

Question Number 0702

Question:
A 42 year old man has a one year history of proptosis of his left eye and diplopia. He has a medical condition which is well controlled with carbimazol. Fundus examination reveals a normal disc and macula. A visual fields examination reveals a dense superior arcuate scotoma suggestive of an optic neuropathy. CT shows enlargement of the inferior, medial, and superior rectus muscles. The extraocular muscles appear normal. A likely diagnosis is

a) Kawasaki's disease
b) ophthalmic artery obstruction
c) Lyme disease
d) thyroid ophthalmohathy
e) cluster headache


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