Often a sample of blood or joint fluid can help you doctor confirm a diagnosis. For example, a blood test showing high blood levels of rheumatoid factor – an antibody that acts against the blood component gamma globulin – or an antibody called anti-cyclic citrullinated peptide antibody (anti-CCP), may suggest rheumatoid arthritis. High levels of antinuclear antibodies (ANAs), abnormal antibodies directed against the cells' nuclei, could suggest lupus or another inflammatory disease.
Tests of fluid drawn with a needle from the joint may reveal crystals of uric acid, confirming a diagnosis of gout; or a bacterium, suggesting that joint inflammation is caused by an infection.
Learn more about lab tests used in diagnosing arthritis.
Lab Tests for Foot Problems
Tests that tell what's going on inside your body.
Often a sample of blood or joint fluid can help you doctor confirm a diagnosis. For example, a blood test showing high blood levels of rheumatoid factor – an antibody that acts against the blood component gamma globulin – or an antibody called anti-cyclic citrullinated peptide antibody (anti-CCP), may suggest rheumatoid arthritis. High levels of antinuclear antibodies (ANAs), abnormal antibodies directed against the cells' nuclei, could suggest lupus or another inflammatory disease.
Tests of fluid drawn with a needle from the joint may reveal crystals of uric acid, confirming a diagnosis of gout; or a bacterium, suggesting that joint inflammation is caused by an infection.
