Could you give me any info regarding the illness giant cell arteritis?

Giant cell arteritis: Inflammatory disease of blood vessels most commonly involving large and medium arteries of the head, predominantly the branches of the external carotid artery. It is a form of vasculitis. The most serious complication of gca is permanent blindness, though this can be prevented by prompt treatment with corticosteroids.

Giant cell arteritis: The incidence of this disease is approximately 5 per 100,000 which increases to 17 per 100,000 after age 50. Because giant cell arteritis rarely occurs in individuals under age 40, any new onset headache in a patient over the age of 50 warrants investigation into the presence of this disease.