A 71-year-old woman with a history of Rheumatoid Arthritis present to the ED complaining of sharp throbbing headache on the right side of her head which has intermittently occurred over the past two months. She also mentions nonspecific malaise and aches mostly in her torso and occasional jaw pain while chewing food. She has a non-focal neurologic exam but a Marcus Gunn pupil on the right is detected. What is the most reasonable screening test available for diagnosis of the suspected critical cause of this patient’s headache?

About the Author: Anton Helman

Dr. Anton Helman is an Emergency Physician at North York General in Toronto. He is an Assistant Professor at the University of Toronto, Division of Emergency Medicine and the Education Innovation Lead at the Schwartz-Reisman Emergency Medicine Instititute. He is the founder, editor-in-chief and host of Emergency Medicine Cases.