What is Causing This Patient’s Headaches?

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A 50-year-old woman presents to the emergency department with a 2-week history of headaches. The pain is widespread and throbbing in nature, lasts between several hours and several days, and is refractory to over the counter analgesics. She also reports a constant whooshing noise in her ears that has become louder and more debilitating in the past few days. Physical examination is unremarkable, and a later angiography reveals the findings seen here. In this patient’s likely diagnosis, which of the following other arteries is most frequently affected? Learn more about this case, take the quiz, and join the conversation on Figure 1.

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