Anti-SS-A 52kD Ab
Immunity & allergy markersWhat the test generally measures, and what to ask about it.
Longetic keeps every lab and record you’ve had organized and easy to find, so your own Anti-SS-A 52kD Ab values sit together on one chart and you walk into your next appointment prepared.
What is Anti-SS-A 52kD Ab?
Antibodies targeting the Ro52 protein, associated with Sjögren's syndrome, lupus, and some inflammatory muscle conditions.
The anti-SS-A/Ro antibody family includes two distinct protein targets, Ro52 and Ro60, and this test specifically measures antibodies against the 52kD (Ro52) protein. Ro52 antibodies are commonly seen in Sjögren's syndrome and lupus, similar to general anti-Ro testing, but they are also associated with inflammatory muscle conditions such as myositis and anti-synthetase syndrome, as well as some forms of interstitial lung disease. Clinicians may order this specific marker when broader anti-Ro testing is positive, or when muscle weakness, lung symptoms, or overlapping autoimmune features are present. Like other autoantibodies, a positive result is one clue interpreted alongside symptoms and additional testing rather than a stand-alone diagnosis.
Tests often checked alongside this
- Anti-Ro (SS-A) Ab — broader Ro antibody testing
- Anti-SS-B Ab — commonly tested alongside
- ANA Pattern and ANA Titer — often positive together
- ESR and hs-CRP — general inflammation markers checked if muscle or lung symptoms are present
How this can show up in how you look and feel
- May be associated with dry eyes or dry mouth
- May be associated with muscle weakness or muscle pain
- May be associated with joint pain
- May be associated with skin changes over the joints
What can affect this marker
- Age
- Sex
- Medications
- Lab variability between testing methods
What to track over time
- Whether levels remain stable or change on repeat testing
- How results correlate with muscle, joint, or dryness symptoms over time
- Whether additional myositis-related antibody testing is considered
What to ask your doctor
- Does this specific Ro52 result change how my broader anti-Ro result is interpreted?
- Could this relate to muscle or lung symptoms I've noticed?
- Should anti-SS-B or other myositis-related antibodies also be checked?
- Is any follow-up testing recommended?
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References
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Official sources
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Peer-reviewed research
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