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What is the difference between the anachoice screen and the ANA screen, ifa? The first one came back positve, but the second came back negative.

3 doctors weighed in
Dr. Robert Kwok
Pediatrics
2 doctors agree

In brief: Diff. lab techniques

Different labs have different ANA tests, which is a test for antibodies a person makes that attach to his own body's tissues, that end up causing auto-immune disease.
Modern tests use "reflex" or "cascade" techniques, meaning one test is done first, and then if positive, another test is done, and then if positive again, a third test is done. Tests have various "positive" ranges (gets complicated).

In brief: Diff. lab techniques

Different labs have different ANA tests, which is a test for antibodies a person makes that attach to his own body's tissues, that end up causing auto-immune disease.
Modern tests use "reflex" or "cascade" techniques, meaning one test is done first, and then if positive, another test is done, and then if positive again, a third test is done. Tests have various "positive" ranges (gets complicated).
Dr. Robert Kwok
Dr. Robert Kwok
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