A 31-year-old woman presented with a 4-week history of blurred vision and 2 weeks of progressive bulging of her left orbit. On examination, there was nontender proptosis of the left eye, paresis of the left abducens nerve, and reduced visual acuity in the left eye. A T2-weighted gadolinium-enhanced magnetic resonance image of the brain is shown.
What is the most likely diagnosis?
A) Retrobulbar abscess
B) Hydatid cyst
C) Optic-nerve glioma
D) Orbital dermoid cyst
E) Foreign body
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