Limitations of the test: Like other antibodies, the fact that the test is not positive in many people with lupus means it can't be used to diagnose lupus. Also, it is more indicative of Sjögren's ...

Blood tests, such as complete blood count (CBC), antinuclear antibody (ANA), erythrocyte sedimentation rate (ESR), and others can help doctors diagnose lupus. Learn more.

Lupus is characterized by abnormalities in many laboratory test results. These abnormalities are different for every patient and vary significantly during the course of a patient[ 146]s disease.

A complement test is a blood test that measures the activity of a group of proteins in the bloodstream. It's often used to help monitor people being treated for autoimmune diseases like lupus and ...

If a person experiences joint pain and tests positive for an antinuclear antibody (ANA) test, this may suggest the presence of an underlying condition causing joint problems and discomfort.

The blood test may also help to detect certain types of cancer, including leukemia and lung cancer. Preparation You don't need any special preparation for the rheumatoid factor test.