Antinuclear Antibody Test

The Antinuclear Antibody (ANA) test is a blood test that checks for antibodies in the body that mistakenly target its own cells' nuclei. High levels of these antibodies can indicate autoimmune diseases, where the immune system attacks healthy tissues, like lupus or rheumatoid arthritis. While a positive result can suggest an autoimmune disorder, it isn't definitive on its own; further tests are usually needed for an accurate diagnosis. This test is commonly used by doctors to help understand and evaluate symptoms related to autoimmune conditions.