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> > > > What causes giant cell arteritis (GCA)?

What causes giant cell arteritis (GCA)?

We don’t yet know the exact cause of GCA. However, we do know that it’s an autoimmune condition.

The immune system normally helps keep us healthy by fighting infection. However, in GCA, these defence mechanisms attack the healthy artery, causing inflammation. We don’t yet know why this happens. GCA isn’t directly inherited, but we know that genetic factors play some part.

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