Autoimmune

An ANA test is a blood test that looks for antinuclear antibodies, which attack healthy cells. It's normal to have a few antinuclear antibodies in your blood. But too many may indicate an autoimmune disorder, such as systemic lupus erythematosus (SLE), rheumatoid arthritis, scleroderma, Addison disease, or autoimmune hepatitis.

Cardiolipin is a blood fat that is important for clotting. When antibodies attack cardiolipin, blood clots can occur. Platelets, blood cells that help with clotting, get used up, leading to problems with bleeding. These antibodies are often high in people with abnormal blood clotting, autoimmune diseases like systemic lupus erythematosus (SLE), or repeated miscarriages.