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3. We Do Not Know the Exact Cause

The exact cause of giant cell arteritis is unknown. However, many researchers believe it is an autoimmune condition in which the body’s immune system attacks the arteries. Considering it is rare among young adults, aging likely plays a role in the disease's development. Like most disorders, genetic and environmental factors are likely involved, as well.

giant cell arteritis sick

Meletios Verras / Getty Images

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