Doctor insights on:
Blood Tests To Detect Lupus
Could you please tell me what blood test are used for lupus. I'm looking at blood test example CBC =blood count. Lupus= ?
Lupus erythematosus is a name given to a collection of autoimmune diseases, in which the human immune system becomes hyperactive and attacks normal, healthy tissues.Symptoms of these diseases can affect many different body systems, including joints, skin, kidneys, blood ...Read more
Can an ANA test or any blood test used to diagnose auto-immune diseases show all the types of lupus?
Not necessarily: Patients with systemic le will almost always have a positive ana. However, patients with lupus confined to the skin, i.e. Discoid le or scle (subacute cutaneous le)may not have a positive ana. A positive ANA by itself does not necessarily indicate sle and is seen in a number of medical conditions. The diagnosis of sle is made on the basis of historical, clinical and laboratory criteria. ...Read moreSee 1 more doctor answer
Yes: There is a simple blood test for lupus called an "ana" (for antinuclear antibody). It is positive, or detectable, in about 20% of healthy people, so it is only helpful as an initial screening. A doctor can ask questions, perform a physical exam and order further tests to figure out if a positive test indicates lupus. A negative test is very reassuring. ...Read moreSee 1 more doctor answer
What is the likelihood of a false negative herpes type specific blood test with background of lupus (sle)?
About 0% to 9%: Quest diagnostics' website states that their herpes type-specific IgG antibody test is 91-100% sensitive, so there are a few false negative results. A repeat test can be done 4-6 weeks later, if worried about a false negative. Lupus should not affect the result, but if a person is on strong immuno-suppressive therapy, his antibody production may be blocked, which may make test results unreliable. ...Read moreSee 1 more doctor answer
If you is tell by your doctor just buy a blood test that you might have lupus what else could it be?
Many factors: Nobody really knows what lupus is, but making the diagnosis is crucial and lives depend on it. Bloodwork is one component along with other clinical features. The usual screen is the anti-nuclear antibody assay which picks up the vast majority of cases, though most people with positive ANA do not have lupus. Ask the titer, pattern, follow-up labs. ...Read more
False positive for Lupus, now positive for HCV, waiting on blood test to confirm. Could HCV cause a false + for lupus?
Yes, but....: Almost all lupus patients have anti-nuclear antibodies in their blood at significant levels, there are other blood tests, but the whole clinical picture needs to be considered before a diagnosis is made, and since no one truly knows what lupus is, some people carry the diagnosis of "borderline / questionable" lupus, and may or may not get treated. ...Read moreSee 2 more doctor answers
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