Immunoglobulins (Igs) are a group of proteins also known as antibodies. Antibodies provide your body with the first line of defense against invading pathogens. Immunoglobulins can be described as ...

What Is an Antinuclear Antibody Test? An antinuclear antibody test is a blood test that looks for certain kinds of antibodies in your body. It’s also called an ANA or FANA (fluorescent antinuclear ...

Many different lab tests are used to find changes in your body that can happen with lupus. The results of each test help your doctor get a fuller picture of your health. Because lab tests alone can’t ...