This test looks for CCP (cyclic citrullinated peptide) antibodies in the blood. CCP antibodies,

also called anti-CCP antibodies, are a type of antibody called autoantibodies. Antibodies and

autoantibodies are proteins made by the immune system. Antibodies protect you from disease

by fighting foreign substances like viruses and bacteria. Autoantibodies can cause disease by

attacking the body's healthy cells by mistake.