A 54 year old lady presents with sudden, severe pain in the left half of her skull. She also complains of pain around her jaw. What is the next likely step?

The key is D. ESR. [Headache in an elderly lady and jaw claudication are suggestive of temporal

arteritis. Temporal arteritis is a condition in which the temporal arteries, which supply blood to the head

and brain, become inflamed or damaged. It is also known as giant cell arteritis. Blood ESR is very high in

temporal arteritis and it is routinely done in elderly with suggestive clinical features].