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Doctor insights on: Blood Test For Lupus Diagnosis

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Is there a blood test for lupus?

Is there a blood test for lupus?

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 more

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Petechiae rashes on upper chest. What could this be? I have had blood test for lupus and sjogren's syndrome but all came back negative except C3 level

Petechiae rashes on upper chest. What could this be? I have had blood test for lupus and sjogren's syndrome but all came back negative except C3 level

Are they petechiae?: Real petechiae do not lose their color when you press down on them. With your dry eyes and joint pain, sjogren and lupus labs are in order. What's your platelet count, did you bleed badly during a dental procedure, and did your physician try something simple like a capillary fragility / tourniquet test? If it really petechiae without signs of clotting trouble, a dermatology consult is in order. ...Read more

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My skin is sore, my joints feel like they have the flu, I have a headache for over 10 days & my doctor says my blood test for lupus is normal.?

My skin is sore, my joints feel like they have the flu, I have a headache for over 10 days & my doctor says my blood test for lupus is normal.?

Many possibilities: Unclear as to absolute diagnmosis as these are several non-specific symptoms. They range from simple viral disease to more serious possibilties. The most troubling is a headache lasting this long. More information is needed to guide you but follow up with your primary care and possibly seeing a neurologist is suggested. ...Read more

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What are the signs of lupus if the blood test didn't show anything?

See details: http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0041704/ The above link should give you the info. However, if the ANA is negative, the chances of you having lupus is small. ...Read more

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If you is tell by your doctor just buy a blood test that you might have lupus what else could it be?

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

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What are rheumatoid factor and other blood test results that suggest lupus?

What are rheumatoid factor and other blood test results that suggest lupus?

ANA, Sm, antidsDNA: Laboratory tests are important but not the only factor in diagnosing lupus. Generally the screening test is for anti-nuclear antibodies (ANA) more specific tests are antibodies to sm antigen and double stranded dna. ...Read more

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What is the likelihood of a false negative herpes type specific blood test with background of lupus (sle)?

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 more

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