Antineutrophil cytoplasmic antibodies (ANCA) are autoantibodies that target antigens found in neutrophils, a specialised type of white blood cell. ANCAs cause neutrophils to attack small blood vessels, leading to the blood vessels becoming swollen and inflamed.

Our test can help you investigate whether your symptoms are down to autoimmune vasculitis or not. If your results are negative, your symptoms are probably not due to autoimmune vasculitis.

Autoimmune conditions occur if your immune system mistakes your body's cells for foreign cells and starts attacking them.