diagnosing lupus
the diversity of symptoms and the different ways they manifest makes lupus a difficult disease to diagnose. because a large number of patients are women of child-bearing age, researchers suspect hormonal changes may be a factor. genetics and the environment may also play a role, however, with family history, sunlight, stress, infections, medication and a history of smoking all viewed as possible causes.
diagnosis, therefore, can be a long and painful process, with doctors typically starting the process by recording symptoms and exploring any family history of the disease. the next steps may be lab tests that search for things such as anemia, low blood cell counts and other anomalies.
these tests may be followed by other exams, including an anti-nuclear antibody (ana) test that detects the presence of antibodies in the body that fight lupus. although most people with the disease test positive on an ana test, many people who do not have lupus will also return a positive result. urine analysis, chest x-rays, echocardiograms and biopsies are other tools that may be used to help diagnose the disease. doctors typically look for multiple clinical signs of lupus, including family history and symptoms, before confirming the presence of the disease.