Pregnant woman with proptosis

A 22-year-old pregnant woman with no significant past medical history presented to the emergency department (ED) after she awoke with a severe right-sided retro-orbital headache and right-sided proptosis. Physical examination, including neurologic examination, was unremarkable, with the exception of moderate right-sided proptosis. She had no visual changes and extra-ocular movements were painful, but intact. She was in the 28th week of her first...