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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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Could you please tell me what blood test are used for lupus. I'm looking at blood test example CBC =blood count. 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 blood tests: Have your physician order an ANA test. If that is positive, seek the care of a rheumatologist. For further tests. Patients with lupus are anemic, usually. ...Read more

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If lupus will it show up in a blood test for rheumatology?

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 more

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If someone is suspectd to get lupus in later stages i.E 30s-40s.Will his blood test for ANA & antidns b +iv in 10s-20s without disease symtoms.

If someone is suspectd to get lupus in later stages i.E 30s-40s.Will his blood test for ANA & antidns b +iv in 10s-20s without disease symtoms.

Need big picture: I understand that you have mouth ulcers, unexplained weight loss, and are taking azathioprine and Plaquenil / hydroxychloroquine; you have a positive ANA at some titer and anti-dsdna. I suspect you have lupus though no one really knows what lupus is and it's defined by criteria; the burning question is whether to treat this aggressively. You deserve a 2nd opinion beyond what we can do. Best 2u. ...Read more

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Do you think if you have any kind of autoimmune disease? Like lupus or anything? Or would it have sawn in blood test. If blood result is normal.

Do you think if you have any kind of autoimmune disease? Like lupus or anything? Or would it have sawn in blood test. If blood result is normal.

See details: There are literally scores of autoimmune diseases. Some can be diagnosed with the help of lab tests and some cannot. Lupus can be present even if all autoantibody testing is negative. However, this is a rare occurrence. ...Read more

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Can an ANA test or any blood test used to diagnose auto-immune diseases show all the types of lupus?

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 more

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The result of my blood test for C3 complement is high and CPK result is too low, so do I have lupus?

Incomplete : Information. High c3 is an acute phase reactant and may be elevated in any case of inflammation. CPK is an indicator of muscle damage and there is no value that is too low. Diagnosis of lupus is based on a number of parameters and is a combination of clinical findings and lab tests. Please consult your doctor for a proper evaluation. ...Read more

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Blood test result- ANA by EIA=negative. Is this reassuring as far as lupus or other autoimmune problem?

Blood test result- ANA by EIA=negative. Is this reassuring as far as lupus or other autoimmune problem?

Mostly: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, your tests are reassuring but do not 100% exclude autoimmune disorders as there are may such disorders that occur without ANA. ...Read more