Year 3common
A 68-year-old woman presents to the clinic with a severe right-sided headache and temple tenderness for the past two weeks. She also reports jaw pain while chewing and vision disturbances. Over the past few months, she has experienced generalized fatigue and morning muscle stiffness. Fundoscopic examination reveals a swollen, pale disc with blurred margins. Laboratory testing shows elevated ESR and CRP levels.
What is the most likely diagnosis?