Why get tested?To help diagnose
rheumatoid arthritis (RA) and differentiate it from other types of arthritis; sometimes to help evaluate the prognosis of a patient with RA
When to get tested?If a patient has joint inflammation and/or undiagnosed or undifferentiated inflammatory arthritis (symptoms suggest but do not yet meet the criteria of RA) and the doctor suspects RA
Sample required?A blood sample drawn from a vein in your arm