Systemic vasculitis most commonly involving medium-sized arteries in the carotid circulation, affecting 1% of the population<unk> , with possible involvement of large vessels like aorta leading to:
Temporal<unk> 
Aortic regurgitation
Aortic arch syndrome
Aortic dissection
Elevated risk in Women and 50-70 yrs of age
"Rule of 50s" can help remember useful points - "temporal<unk>  affects patients at least 50 years of age, with a serum ESR > 50 mm/hr and is treated with 50mg of prednisone daily"
Can cause painless, ischemic optic neuropathy with severe vision loss if left untreated
Associated with polymyalgia rheumatica 
50% of patients with<unk>  have concomitant Polymylalgia Rheumatica. 15% of patients with Polymyalgia Rheumatica develop<unk> 
Temporal<unk> 
Aortic regurgitation
Aortic arch syndrome
Aortic dissection
50% of patients with<unk>  have concomitant Polymylalgia Rheumatica. 15% of patients with Polymyalgia Rheumatica develop<unk>
Giant cell arteritis
Migraine headache
Takayasu arteritis
Tension headache
Cluster headache
Benign paroxysmal positional vertigo
Meningitis/encephalitis
Carotid-cavernous fistula