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Doctor insights on: False Positive Ana Results

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Ana (Definition)

An "ana" is a blood test used to screen a person for the possibility of several autoimmune diseases. It is important to remember that this is a screening test and a positive result only indicates more testing may be warranted. No blood test is perfect, and getting to a diagnosis is usually much more complex than drawing blood and looking at a number ...Read more


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Ana screen, ifa positive a (negative) means?

Ana screen, ifa positive a  (negative)   means?

Nothing by itself: One person in four tests positive. The vast majority of these people have no problems. The clinical picture is key, and how high the titer is may be helpful. ...Read more

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What causes false positive HCV antibody test results?

What causes false positive HCV antibody test results?

Misinformed?: Who told you that your hep c test was false? If you have no viral load that means you cleared an infection. Are you sure you are getting the right advice? ...Read more

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Positive HIV screener test at blood donation... Negative IFA and Negative NAT... False positive?

Positive HIV screener test at blood donation... Negative IFA and Negative NAT... False positive?

Yes: The initial screening test for HIV is very sensitive, but not very specific. The back up screening tests are much more specific for HIV. ...Read more

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Ana test results 1:320 mean? Speckled homogeneous

Ana test results 1:320 mean? Speckled homogeneous

Not necessarily: The ANA is a screening test for lupus but is not specific. It can be positive in numerous other diseases and in normal people. It has to be evaluated in the context of the clinical picture and the results of other autoantibody tests. ...Read more

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Can ANA test be false negative for lupus?

Can ANA test be false negative for lupus?

Lupus: Has specific criteria for diagnosis, ANA is just one of them and canot be relied on by itself for a diagnosis. ...Read more

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What do these results mean? Hbsag positive, hbs ab negative, hbeag negative, hbeab positive and hbc ab positive?

What do these results mean? Hbsag positive, hbs ab negative, hbeag negative, hbeab positive and hbc ab positive?

This is serious: It is likely that you are infected with two different hepatitis viruses and need to be under the care of a physician who's willing to explain lab results and get you treated. Please don't let this go. Your life may well depend on your being appropriately assertive. ...Read more

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False positive stress test reason?

False positive stress test reason?

Body habitus: Most common cause of false positive stress test is body habitus. This commonly affects women because the heart rhythm needs to be picked up through their breast tissue. ...Read more

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Positive ana positive rnp low positive ccp positive dsdna can you tell me if this means lupus or mctd?

?: depends on the clinical picture as well, results point towards auto immune disorder, but need to be put in clinical context and follow up to commit to a diagnosis ...Read more

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Positive Ana and dsdna. Retest showed neg ana and dsdna, but low c4. What does the low c4 mean? Were first results false positive?

Complex: sample handling, timing and transport are important, the process is delicate and constitutes multiple steps at different temperatures, and the results are interpreted in context with the clinical picture, just ask your doctor / rheumatologist for interpretation, if just suspicion, observation and follow up are the way to go for many clinicians, wish you wellness ...Read more

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What does a high positive ANA ifa test and negative choice antibody test mean?

See details: I have never heard of a choice antibody test. I positive ANA must be evaluated in the context of the clinical picture. It is a screening test for lupus but can be positive in numerous other diseases and often in people without any disease. ...Read more

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Are false positive herpes test likely?

Are false positive herpes test likely?

No: A positive antibody means you're infected with herpes. That doesn't mean you're developing outrbreaks, but it does mean that you at least have latent herpes somewhere in your body. A positive culture or pcr for herpes means you have an active lesion. ...Read more

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Sm/rnp antibody- ANA choice- positive, speckled/titer: 1:1280; sm & rnp (done alone) negative; sm/rnp antibody (together?) positive 3.0 guessing mctd?

Sm/rnp antibody- ANA choice- positive, speckled/titer: 1:1280; sm & rnp (done alone) negative; sm/rnp antibody (together?) positive 3.0 guessing mctd?

Heads up: One of the things that's frustrating about these antibody tests looking for different connective tissue diseases is that they are difficult to do and are fraught with pitfalls. I suspect you've had at least one lab error to complicate your workup. Have you have a tube test for u1-rnp? Your clinical symptoms and signs actually tell more about your diagnosis ; best direction for treatment. ...Read more

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Incidence of false false positive PPD in lupus patients?

Incidence of false false positive PPD in lupus patients?

Zero: Lupus does not cause falsely positive ppds. If the PPD is positive, have a quantiferon gold test for tb. This is more accurate. ...Read more

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What causes positive ANA results?

What causes positive ANA results?

Possibly normal: Up to 5% of healthy people may have a low titer ana. Lupus and other autoimmune diseases and sarcoidosis are possiblities. Diagnosis is on the basis of associated findings, not the ANA by itself. ...Read more

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Can MS cause false positive ELISA HIV test?

Can MS cause false positive ELISA HIV test?

No: MS does not affect blood tests, and specifically does not cause positive ELISA HIV test, See infectious disease doctor. ...Read more

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ANA positive SSA SSB weekly positive SCL weekly positive RNP SM weekly positive. Any implications? What are the differential diagnosis? WaDoes it mean

ANA positive SSA SSB weekly positive SCL weekly positive RNP SM weekly positive. Any implications? What are the differential diagnosis? WaDoes it mean

Pos auto ab tests: You are describing positive tests for auto antibodies. The differential diagnosis can be extensive. I am assuming a rheumatologist has ordered these tests? You need f/u with them to educate you what they mean, what further tests may need to be done and review your symptoms. Proper rheum DX is not based only on test results, but exam findings and symptoms of patient. Good luck. ...Read more

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Rubella igg. Results postive. Pregnant.Should.Icocerned

Rubella igg. Results postive. Pregnant.Should.Icocerned

Rubella IgG: This means that you have been vaccinated for this infection. And, you are fully immune to it. There is nothing to worry about in regards to being pregnant. ...Read more

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How about Ana screen positive, Ana titer (ifa) 1:80 Hi, and pattern speckled?

How about it?: Up to a quarter of women your age have an ANA (immunofluorescent antibody) at a low titer like yours with a speckled pattern. If there's a question of whether you have lupus or one of its relatives, it's a piece of information to note and file for future reference. A negative ANA would rule several things out. Your result proves nothing positive. Best wishes. ...Read more