Yes, false positives are possible when testing for lupus. The antinuclear antibody (ANA) test is the most common first step in diagnosing lupus, and while about 98% of people with lupus test positive, some people without lupus also get a positive result.
This is why a positive ANA alone isn't enough to confirm a lupus Show Full Answer
Yes, false positives are possible when testing for lupus. The antinuclear antibody (ANA) test is the most common first step in diagnosing lupus, and while about 98% of people with lupus test positive, some people without lupus also get a positive result.
This is why a positive ANA alone isn't enough to confirm a lupus diagnosis. Doctors use a combination of tests and symptoms to build a fuller picture. To be diagnosed, a scoring system is used where different symptoms are assigned points — a total of 10 or more points is needed for a lupus diagnosis.
Additional tests that help confirm or rule out lupus include:
- Anti-dsDNA antibodies — more specific to lupus than the ANA test
- Anti-Smith (anti-Sm) antibodies — another lupus-specific marker
- Complement levels (C3 and C4) — low levels can suggest active lupus
- Complete blood count (CBC) — checks red/white blood cells and platelets
- Urinalysis — looks for protein or blood in urine, which may signal kidney involvement
It's always worth following up with a rheumatologist if results are unclear, as getting the right diagnosis is key to managing things well.
August 15
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