GCA is a disease characterised by inflammation of large and medium sized blood vessels.
An alternative name for this condition is “Temporal Arteritis” as the blood vessels in the temple area of the head (sides of the forehead) are commonly affected.
The giant cells referred to are specific collections of immune system cells seen in the areas of inflammation if a biopsy is performed.
This condition is one of the commonest forms of vasculitis.
It is more commonly seen in older patients and is seldom diagnosed below the age of 50.