13th August 2024

A 60-year-old man presents with a 4 day history of left-sided headache and fatigue

A 60-year-old man presents with a 4 day history of left-sided headache and fatigue. He first noticed the pain when brushing his hair. He has a past medical history of hypertension and type 2 diabetes mellitus. On examination, his temperature is noted to be 37.7 degrees Celsius. On examination, there is tenderness on palpation of the left temporal region and scalp with thickening of the temporal artery. His vision is normal and fundoscopy also shows a normal optic disc. He has some pain and stiffness in his shoulders and hips.

His investigations are as follows:

ESR: 96

Vascular ultrasound of temporal artery: halo sign present

What is the likely underlying diagnosis?

Select the SINGLE most appropriate option from the list below. Select ONE option only.